5. 75.0 g of 4.0°C water is heated until its temperature is 37°C. If the specific heat of water is 4.18 J/g°C, calculate the energy needed to cause this rise in temperature. SHOW YOUR WORK​

Answers

Answer 1

The energy required to cause the rise in temperature of 75g of water is 10345.5J.

Specific heat is a physical property of a substance that quantifies the amount of heat energy required to raise the temperature of a unit mass of the substance by one degree Celsius (or one Kelvin).

Given information,

Mass (m) = 75g

Specific heat (c) = 4.18 J/g°C

Change in temperature (Δt) = 37°C - 4°C = 33°C

The formula that can be used to determine the energy is, Energy (Q) = m × c × Δt

Q = 75 × 4.18 × 33

Q = 10345.5J

Therefore, the energy needed to cause the rise in temperature of 75.0 g of water from 4.0°C to 37°C is 10345.5J.

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Related Questions

I'm making a AD for my special ed class room and I am interviewing people. Make 10 unique questions I can ask my fellow classmates about the things they have learned in this room.

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These are 10 unique questions you can ask your fellow classmates about the things they have learned in your special ed classroom:

What is your favorite thing about our classroom?What is one thing you have learned in our classroom that you will never forget?What is one thing you would like to learn more about in our classroom?How has our classroom helped you to succeed?What is one thing you would like to say to your teacher?What is one thing you would like to say to your classmates?What is one thing you would like to say to your parents?What is one thing you would like to say to the world?What is your dream for the future?What is one thing you are grateful for?

What are special ed classroom?

A special education classroom is a classroom designed to meet the needs of students with disabilities. These classrooms are staffed by specially trained teachers who are able to provide individualized instruction and support to students with a variety of disabilities.

These questions are designed to get your classmates thinking about the things they have learned in your special ed classroom and how those things have impacted them. The answers to these questions can be used to create a powerful and informative ad for your classroom.

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‼️‼️‼️need help asap‼️‼️‼️

Answers

24. To calculate the molarity of a solution, we must first find out how many moles of [tex]BaI_2[/tex] are in the solution.

Molar mass of BaI2 = (1 x atomic mass of Ba) + (2 x atomic mass of I)

= (1 x 137.33 g/mol) + (2 x 126.90 g/mol)

= 137.33 g/mol + 253.80 g/mol

= 391.13 g/mol

Number of moles of BaI2 = mass of BaI2 / molar mass of BaI2

= 413 g / 391.13 g/mol

= 1.056 mol

the molarity of the solution using the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

Volume of solution = 750 ml = 750 ml / 1000 ml/L = 0.750 L

Molarity = 1.056 mol / 0.750 L

= 1.408 M

Therefore, the molarity of the solution is 1.408 M.

25. a. [tex]P_20_7[/tex] - Ionic compound (Phosphorus(V) oxide)

b. [tex]SnBr_2[/tex] - Ionic compound (Tin(II) bromide)

c. [tex]Fe(OH)_2[/tex]-  Ionic compound (Iron(II) hydroxide)

d. [tex]Cl_30_8[/tex] - Not a valid chemical formula

26.

A. (NH4)2CO3 is soluble in water (NH4) in an ionic substance called 2CO3 containing the ions carbonate and ammonium.

B. Fe(OH)2 is insoluble in water. Iron(II) hydroxide is only sparingly soluble.

C. CaOH is not soluble in water. Only very little calcium hydroxide is soluble.

D. PbCl2 is insoluble in water. The chloride of lead(II) is sparingly soluble.

27. FeS + 2KCl = FeCl2 + K2S

FeS is an insoluble precipitate.

2KCl dissolves in aqueous solution.

ZnCl2 + SrSO4 = ZnSO4 + SrCl2

SrSO4 is an insoluble precipitate.

ZnCl2 dissolves in aqueous solution.

28. In salt water, the solute is the salt (sodium chloride, or NaCl), and the solvent is water. The element which dissolves in the solvent to form a solution is called solute.

29. Charles's law states that, if the pressure and volume of a gas remain constant, the volume of a gas falls as the temperature increases. As a result, the capacity of the balloon will decrease as it ascends to altitudes where the temperature is -15 °C.

30. The average kinetic energy of the particles of a substance increases with increase in its temperature. This is because temperature is a gauge for the specific kinetic energy of the constituent particles of a substance. On the other hand, the average kinetic energy falls as the temperature increases.

31. When the volume of a gas decreases, its pressure increases. Boyle's law, which states that at a given temperature, the pressure of a gas is inversely proportional to its volume, describes this relationship. On the other hand, pressure falls when volume increases.

32. The pressure of a gas increases along with its temperature. Gay–Lussac's law, which states that the pressure of a gas is directly proportional to its temperature, given the volume and volume of the gas is constant, describes this relationship.

33. The volume of a syringe is reduced as a marshmallow is pressed and the plunger is depressed. As a result the pressure inside the syringe increases. This is because Boyle's law states that the volume and pressure of a gas are inversely proportional. The decrease in volume causes the air inside the syringe to contract, exerting more pressure on the marshmallow, which is then crushed.

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A student weighs out a 2.17 g sample of KOH, transfers it to a 300. mL volumetric flask, adds enough water to dissolve it and then adds water to the 300. mL tick mark.
What is the molarity of potassium hydroxide in the resulting solution?

Answers

The molarity of potassium hydroxide in the resulting solution is 0.129 M.

How to calculate molarity?

Molarity of a substance refers to the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.

According to this question, a student weighs out a 2.17g sample of KOH, transfers it to a 300. mL volumetric flask, adds enough water to dissolve it and then adds water to the 300. mL tick mark.

No of moles of KOH = 2.17g ÷ 56.11g/mol = 0.039 moles

Molarity = 0.039 moles ÷ 0.3L = 0.129 M

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The chemical equation below is unbalanced. CaS + AlC → A + CaC Balance this equation.

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The balanced chemical equation is CaS + AlC → A + CaC

To balance the chemical equation CaS + AlC → A + CaC, we need to ensure that the same number of atoms of each element is present on both sides of the equation. Here's the step-by-step process to balance the equation:

Begin by counting the number of atoms of each element on both sides of the equation.

Left side (reactants):

Calcium (Ca): 1

Sulfur (S): 1

Aluminum (Al): 1

Carbon (C): 1

Right side (products):

A: 1

Calcium (Ca): 1

Carbon (C): 1

Sulfur (S): 0

Start by balancing the elements that appear in the fewest compounds. In this case, we can balance sulfur (S) first. Since there is only one sulfur atom on the left side and none on the right side, we need to add a coefficient of 1 in front of A on the right side to balance the sulfur.

CaS + AlC → 1A + CaC

Next, balance calcium (Ca) by adding a coefficient of 1 in front of CaS on the left side.

1CaS + AlC → 1A + CaC

Now, balance aluminum (Al) by adding a coefficient of 1 in front of AlC on the left side.

1CaS + 1AlC → 1A + CaC

Finally, balance carbon (C) by adding a coefficient of 1 in front of CaC on the right side.

1CaS + 1AlC → 1A + 1CaC

The balanced chemical equation is:

CaS + AlC → A + CaC

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B2 2- orbital picture​

Answers

The B2 2- orbital is a molecular orbital formed by the combination of two atomic orbitals from two boron atoms. It is derived from the overlap of two 2p atomic orbitals. The B2 2- orbital can be represented by a molecular orbital diagram, where the two 2p orbitals combine to form two molecular orbitals: a bonding orbital (lower in energy) and an antibonding orbital (higher in energy).

In the B2 2- orbital picture, the bonding orbital is lower in energy and has a lower electron density in the internuclear region. It contributes to the stability of the molecule. The antibonding orbital is higher in energy and has a node in the internuclear region. It does not contribute to the stability of the molecule and is less populated with electrons.

The B2 2- orbital diagram would show the relative energy levels of the atomic orbitals and the resulting molecular orbitals. The bonding orbital would be lower in energy and occupied by electrons, while the antibonding orbital would be higher in energy and unoccupied or less populated with electrons.

help with this question pls

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The addition of a catalyst to this reaction would cause a change in "I" indicated energy differences.

If a catalyst is added to a reaction, it typically affects the activation energy (Ea) of the reaction. The activation energy is the energy barrier that needs to be overcome for the reaction to proceed.

In the context of the energy diagram for the reaction X + Y -> Z, the addition of a catalyst would primarily affect the energy difference related to the activation energy. Let's consider the options:

It is generally expected that the addition of a catalyst would primarily affect the activation energy (Ea) of the reaction, which is typically associated with the energy difference labeled as "I" on energy diagrams.

Therefore, the answer is: I only: The addition of a catalyst would cause a change in the energy difference labeled as "I" on the energy diagram.

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What is the molarity if 44 g of CaCl2 is dissolved 95 mL of water?

Answers

The molarity of the solution, if 44g of [tex]CaCl_{2}[/tex] is dissolved in 95 ml of water is 4.1733 M

To calculate the molarity (M) of a solution, we use the formula:

Molarity (M) = moles of solute/volume of solution in liters

As per the question:

Mass of [tex]CaCl_{2}[/tex] = 44 g

Volume of water = 95 mL = 0.095 L

To find molarity, we need to determine the number of moles of [tex]CaCl_{2}[/tex] by dividing the given mass by its molar mass.

Molar mass of [tex]CaCl_{2}[/tex] = 40.08 g/mol (for [tex]Ca[/tex]) + (2 × 35.45 g/mol) (for [tex]Cl[/tex])

Molar mass of [tex]CaCl_{2}[/tex] = 110.98 g/mol

Number of moles of [tex]CaCl_{2}[/tex] = Mass of [tex]CaCl_{2}[/tex] / Molar mass of [tex]CaCl_{2}[/tex]

Number of moles of [tex]CaCl_{2}[/tex] = 44 g / 110.98 g/mol

Number of moles of [tex]CaCl_{2}[/tex] ≈ 0.3965 mol

Now, to calculate the molarity of the solution, we can use this formula:

Molarity (M) = moles of solute/volume of solution in liters

Molarity (M) = 0.3965 mol / 0.095 L

Molarity (M) ≈ 4.1733 M

Therefore, the molarity of the solution is approximately 4.1733 M when 44 g of [tex]CaCl_{2}[/tex] is dissolved in 95 mL of water.

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Plants need light from the sun in order to go through photosynthesis. Which type of air pollution would most likely decrease the amount of sunlight a plant can absorb?

Answers

Answer:

Particulate matter pollution decreases the amount of sunlight plants can absorb for photosynthesis.

Explanation:

Which of the following describes an impact of the specific heat of water on the planet? (3 points)

A. Islands and coastal places have moderate pleasant climates.

B. Ocean waters experience sudden spikes and drops in temperature.

C. The internal temperature of living organisms varies over a wide range.

D. Inland places have minimal temperatures changes throughout the year.

Answers

An impact of the specific heat of the water on the planet is that islands and coastal places have moderately pleasant climates. Therefore, option A is correct.

The specific heat of water is relatively high compared to other substances. This means that water requires a significant amount of heat energy to increase its temperature. As a result, water has a stabilizing effect on the climate of coastal and island regions.

The high specific heat of the water helps to moderate temperature changes, resulting in milder and more pleasant climates in these areas.

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A student sees 3.0 M HCI on the shelf. What does this mean about the solution? How many moles would be in 4 L of this solution?

Answers

answer

To determine the number of moles in 4 liters of this solution, you can use the formula:

moles = concentration (M) x volume (L)

Substituting the given values:

moles = 3.0 M x 4 L

moles = 12 moles

Therefore, there would be 12 moles of HCl in 4 liters of the 3.0 M HCl solution.

CHEM FINAL TOMORROW!!! Really need help understanding a few topics, if anyone could explain this to me it would help a lot!!!

Answers

Answer:

[tex]\large \textsf{If the Keq of a reaction is 4$\times$10$^{-7}$, then:}\\\\\large \textsf{$\implies$ the equilibrium lies slightly to the left.}[/tex]

Equilibrium Constant (Keq)

The position or extent of a chemical equilibrium can be expressed quantitatively using the equilibrium constant (Keq). If the value of Keq is large, then the equilibrium lies to the right (the product side). If the value of Keq is small, then the equilibrium lies to the left (the reactant side).

In terms of sizing, a small value of Keq usually ranges from 10⁻¹⁰ to 10⁻⁵⁰ and beyond. A large value of Keq usually ranges from 10¹⁰ and onwards.

∴ for a Keq of 4×10⁻⁷, we say that the equilibrium lies slightly to the left.

A gas occupies a volume of 139.3-mL at 135.5-kPa. What volume will the gas occupy at 138.7-kPa if the temperature remains the same?

Answers

The volume the gas will occupy at pressure of 138.7 KPa, given that the temperature remains the same is 136 mL

How do i determine the new volume of the gas?

The new volume of the gas, given that the new pressure is 138.7 KPa can be obtained as follow:

Initial volume of gas (V₁) = 139.3 mLInitial pressure of gas (P₁) = 135.5 KPaNew pressure of gas (P₂) = 138.7 KPaNew volume of gas (V₂) =?

P₁V₁ = P₂V₂

Inputting the given parameters, we have:

135.5 × 139.3 = 138.7 × V₂

18875.17 = 138.7 × V₂

Divide both side by 138.7

V₂ = 18875.17 / 138.7

V₂ = 136 mL

Thus, we can conclude that the volume of the gas will be 136 mL

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What is the percent composition of Oxygen in H₂SO4
48.044%
57.14%
22.145%
65.25%

Answers

65.25% is the answer for this

Answer:

65.25%

Explanation:

To determine the percent composition of oxygen in H₂SO₄, we need to calculate the mass of oxygen relative to the total molar mass of H₂SO₄ and express it as a percentage.

Step 1: Calculate the molar mass of H₂SO₄.

H₂SO₄ consists of two hydrogen atoms (H), one sulfur atom (S), and four oxygen atoms (O). The atomic masses of these elements are:

H = 1.01 g/mol

S = 32.07 g/mol

O = 16.00 g/mol

Molar mass of H₂SO₄ = (2 × H) + S + (4 × O)

= (2 × 1.01) + 32.07 + (4 × 16.00)

= 98.09 g/mol

Step 2: Calculate the mass of oxygen in H₂SO₄.

Since there are four oxygen atoms in one molecule of H₂SO₄, the mass of oxygen is:

Mass of oxygen = 4 × (molar mass of O)

= 4 × 16.00

= 64.00 g

Step 3: Calculate the percent composition of oxygen.

Percent composition of oxygen = (mass of oxygen / total molar mass of H₂SO₄) × 100

= (64.00 / 98.09) × 100

≈ 65.25%

Therefore, the percent composition of oxygen in H₂SO₄ is approximately 65.25%.

Hope this helps!

examples of chemical compounds that are formed by swapping the valencies

Answers

Some examples of chemical compounds that are formed by swapping the valencies are:

Sodium chloride (NaCl)Magnesium oxide (MgO)Carbon dioxide (CO2)Water (H2O)

What is valency?

In chemistry, one can analyze an element's combining capacity with other atoms through its valency, crucial for creating chemical compounds or molecules.

Recently, an article featured a comparable description detailing atomic valence as "the electrons utilized by the atom during bonding." There are also two distinct formulas available to determine the element's level of valence.

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CHEM FINAL TOMORROW!!!! If anyone could give a short explanation on how this works, it would help so much!

Answers

Equilibrium

Le Chatelier's Principle tells us what happens to the equilibrium of a chemical system (reaction) when certain stresses are inflicted onto it.

Temperature

When the temperature of a system is increased, the system moves away from the heat. For instance, for a forward exothermic reaction, it would move to the reactants side, favouring the endothermic reaction. For a forward endothermic reaction, it would however favour the forward reaction with an increase in heat.

The opposite occurs when heat is removed.

Concentration

When the concentration of a reactant is increased, the equilibrium shifts to the right and favours the formation of products. The opposite occurs when the concentration of a product is increased, it shifts to the left.

Pressure/Volume

Pressure and volume are inversely proportional, meaning an increase in pressure leads to a decrease in volume (and vice versa). When pressure is increased/volume is decreased, the system shifts in the direction of least moles/molecules. Count the sum of the coefficients on the reactants and products side to determine which side this is.

Again, the opposite occurs when pressure is decreased or volume is increased; the system shifts to the side with more moles.

Other Things to NoteRemember, only gases and aqueous solutions affect the equilibrium. Pure substances, such as solids and liquids, are not. For instance, if the concentration of a solid substance is increased, it will not have an affect on the equilibrium.The addition of a catalyst will have no effect on the equilibrium.Temperature is the only thing that affects the equilibrium constant.

Answers

Taking into account all the pieces of information mentioned above, here is what our answers should be to the given question:

A. Increasing [SO2]: shifts right

B. Removing O2: shifts left

C. Increasing temperature: shifts left

D. Decreasing pressure: shifts left

E. Add a catalyst: no effect

Discuss three types of valency

Answers

Monovalent Valency, Divalent Valency and Multivalent Valency are three types of valency.

Valency refers to the combining capacity of an atom to form chemical bonds. There are three types of valency:

Monovalent: Atoms with a valency of 1 can form only one bond. Examples include hydrogen (H) and chlorine (Cl), which can each form one bond.

Divalent: Atoms with a valency of 2 can form two bonds. Oxygen (O) and calcium (Ca) are examples of divalent atoms.

Multivalent: Atoms with multiple valencies can form different numbers of bonds. Transition metals such as iron (Fe) and copper (Cu) exhibit multivalency, allowing them to form varying numbers of bonds, depending on the specific compound and oxidation state.

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Calculate the volume in L of Oxygen gas collected at STP if the sample has a mass of 2.67g?

Answers

Answer:

[tex]\huge\boxed{\sf 1.869\ L}[/tex]

Explanation:

Given that,

Mass = m = 2.67 g

Molar mass (O₂) = 16 × 2 = 32 g/mol

Finding no. of moles:

We know that,

No. of moles = mass in g / molar mass

No. of moles = 2.67 / 32

No. of moles = 0.08 moles

Also, we know that:

1 moles of O₂ at STP = 22.4 LMultiply both sides by 0.08

1 × 0.08 moles of O₂ at STP = 22.4 × 0.08 L

0.08 moles of O₂ at STP = 1.869 L

So, the volume of 0.08 moles of oxygen gas at STP will be 1.869 L.

[tex]\rule[225]{225}{2}[/tex]

How many atoms of carbon are there in 0.37 mol of procaine, C13H20N202. a "pain killer" used by dentists?​

Answers

There are approximately 2.8939 x[tex]10^2^4[/tex] carbon atoms in 0.37 mol of procaine.  The molecular formula of procaine (C₁₃H₂₀N₂₀₂), one can see that there are 13 carbon atoms (C13) in one molecule of procaine.

Avogadro's number (6.022 x [tex]10^2^3[/tex]) represents the number of particles (atoms, molecules, or formula units) in one mole of a substance

The number of molecules of procaine in 0.37 mol:

Number of molecules = 0.37 mol x (6.022 x[tex]10^2^3[/tex] molecules/mol)

Number of carbon atoms = Number of molecules x 13 carbon atoms/molecule

Number of molecules = 0.37 mol x (6.022 x [tex]10^2^3[/tex]molecules/mol)

= 2.22614 x [tex]10^2^3[/tex]molecules

Number of carbon atoms = 2.22614 x [tex]10^2^3[/tex] molecules x 13 carbon atoms/molecule

= 2.8939 x [tex]10^2^4[/tex]carbon atoms

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balanced equation for the decomposition of aluminium tetraoxosulphate​

Answers

The balanced equation for the decomposition of aluminium tetraoxosulphate (also known as aluminium sulfate) is:

2Al2(SO4)3(s) → 2Al2O3(s) + 3SO2(g) + 3O2(g)

This equation shows that when solid aluminium tetraoxosulphate is heated, it decomposes into solid aluminium oxide, and gases sulphur dioxide and oxygen. The coefficients in the balanced equation indicate that two molecules of aluminium tetraoxosulphate decompose to form two molecules of aluminium oxide, three molecules of sulphur dioxide, and three molecules of oxygen.

I need help please:(

Answers

Diatomic: Composed of two atoms. Polar: A bond with a negative end and a positive end. Nonpolar: A bond in which neither atom takes more than its share of electrons. Metallic: A type of bond that allows valence electrons to move freely among ions. Electronegativity: Determines what type of bond will form.

The ability of an atom or functional group to draw electrons to itself is known as electronegativity in chemistry.

Diatomic molecules consist only of two atoms, whether they are from the same or distinct chemical elements.

Since charges fluctuate, a momentary dipole moment occurs in a so-called nonpolar molecule at any given time if the charge arrangement is spherically symmetric when averaged across time.

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pls help read bellow & answer

Answers

The value of ΔG for the first reaction was calculated to be -16,21,956 kJ. The reaction is spontaneous as the value of ΔG is negative. The value of ΔS for the second reaction is 3.8 J/K. In the second equation, neither the forward nor the reverse reaction is spontaneous.

ΔG only relates to variations where the temperature and the pressure are constant. This is where most reactions take place in the lab. The system is typically open to the environment (constant pressures) and the reaction is started or ended at room temperature.

If ΔG < 0, the process is spontaneous. If ΔG = 0, the system is stable. If ΔG > 0, the process isn’t spontaneous according to the formula but occurs in the opposite direction.

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(a) Magellan's ships set sail with basic foods that provided a balanced diet.
What is meant by a balanced diet?
(b) Suggest why Magellan took some live animals with him on the voyage.
(c) Most of the sailors on the Victoria developed a deficiency disease called scurvy.
(I) What is meant by a deficiency disease?
(lI) Describe one symptom of scurvy.
(IlI) What is the cause of scurvy?
(iv) Suggest why Elcaro did not develop this deficiency disease.

Answers

The balanced diet refers to consuming a variety of foods in appropriate proportions to provide all the necessary nutrients, vitamins, and minerals required for optimal health and well-being.

(a) It involves incorporating different food groups, such as fruits, vegetables, grains, protein sources, and dairy products, to ensure the body receives a proper balance of essential nutrients.

(b) Magellan took live animals on the voyage for various reasons. Firstly, the animals provided a source of fresh food, such as meat, milk, and eggs, which could supplement their diet during the long journey. Secondly, the animals could be used for breeding, ensuring a sustainable supply of food in case of shortages. Additionally, live animals were also valuable for trade and barter with indigenous communities encountered during the voyage.

(c) (I) A deficiency disease refers to a health condition that occurs due to a lack or inadequate intake of specific nutrients, vitamins, or minerals essential for normal bodily functions.

(lI) One symptom of scurvy is the development of swollen, bleeding gums. Other symptoms may include fatigue, weakness, joint pain, shortness of breath, and impaired wound healing.

(IlI) Scurvy is caused by a severe deficiency of vitamin C (ascorbic acid). Vitamin C is necessary for the production of collagen, a protein that helps maintain the health of blood vessels, gums, and other connective tissues in the body.

(iv) Elcaro did not develop scurvy because it is likely that they had access to fresh fruits and vegetables during the voyage. Fresh fruits and vegetables are excellent sources of vitamin C, and their consumption would have prevented the deficiency. The absence of scurvy among the crew of Elcaro suggests that they had a sufficient intake of vitamin C through their diet, avoiding the vitamin C deficiency responsible for scurvy.

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CAN SOMEONE PLEASE ANSWER THIS CORRECTLY??


In this activity, you are tasked with designing an airbag for a company that creates airbags for automobiles. You must design the driver’s front airbag for a specific car model so it will protect the driver as effectively as possible. For this car, the airbag must have a volume of 58 liters when fully inflated. To provide an adequate cushion for the driver’s head, the air pressure inside the airbag should be 4.4 psi. This pressure value is in addition to the normal atmospheric pressure of 14.7 psi, giving a total absolute pressure of 19.1 psi, which equals 1.30 atmospheres.


One of the main components of an airbag is the gas that fills it. As part of the design process, you need to determine the exact amount of nitrogen that should be produced. Calculate the number of moles of nitrogen required to fill the airbag. Show your work. Assume that the nitrogen produced by the chemical reaction is at a temperature of 495°C and that nitrogen gas behaves like an ideal gas. Use this fact sheet to review the ideal gas law.

Answers

First, we need to calculate the number of liters stored in the airbag (V). This can be done using the formula:

V = (P * n * R * T) / (Ptot)

V = (4.4 psi * n * 0.08206 Latm/mol·K * 495K) / (19.1 psi)

V = (0.08206 Latm/mol·K * 495K) / (1.3 atm)

V = 58.8 liters

Next, we need to calculate the number of moles of nitrogen needed to fill the airbag (n). This can be done using the formula:

n = (V * Ptotal) / (R * T)

n = (58.8 liters * 19.1 psi) / (0.08206 Latm/mol·K * 495K)

n = 0.135 moles of nitrogen needed to fill the airbag.

at what temperature in °C does 0.750 mol of an ideal gas occupy a volume of 35.9 L at a pressure of 1.13 atm

Answers

At a pressure of 1.13 atm and a volume of 35.9 L, 0.750 mol of an ideal gas will occupy a temperature of approximately 387.66°C.

Given information,

Pressure (P) = 1.13 atm

Volume (V) = 35.9 L

Number of moles (n) = 0.750 mol

The ideal gas law equation: PV = nRT

Where:

P = pressure (in atm)

V = volume (in liters)

n = number of moles

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

Now,

T = PV / (nR)

T = (1.13 * 35.9 ) / (0.750 * 0.0821)

T = (40.607 atm·L) / (0.061575 mol·L/(K·atm))

T ≈ 660.81 K

T(°C) = T(K) - 273.15

T(°C) ≈ 660.81 - 273.15

T(°C) ≈ 387.66°C

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How many formula units are in 50.0g of Pb02?

Answers

There are approximately [tex]1.258 x 10^2^3[/tex] formula units in 50.0 g of PbO2.

To solve this problem

We must utilize the molar mass of PbO2 (lead dioxide) and the idea of Avogadro's number to calculate the number of formula units in a given mass of PbO2.

The molar mass of PbO2 is calculated as follows:

1 atom of Pb (lead) has a molar mass of approximately 207.2 g/mol.

2 atoms of O (oxygen) have a combined molar mass of approximately 32.0 g/mol (16.0 g/mol per oxygen atom).

Therefore, the molar mass of PbO2 is:

Molar mass of PbO2 = (1 * molar mass of Pb) + (2 * molar mass of O)

= (1 * 207.2 g/mol) + (2 * 16.0 g/mol)

= 207.2 g/mol + 32.0 g/mol

= 239.2 g/mol

Now, we can use the molar mass to determine the number of formula units in 50.0 g of PbO2.

Number of moles = Mass (in grams) / Molar mass

= 50.0 g / 239.2 g/mol

≈ 0.209 moles (rounded to three decimal places)

Since 1 mole of any substance contains Avogadro's number of particles [tex](approximately 6.022 x 10^2^3),[/tex]we can calculate the number of formula units by multiplying the number of moles by Avogadro's number:

Number of formula units = Number of moles * Avogadro's number

[tex]= 0.209 moles * (6.022 x 10^2^3 formula units/mole)[/tex]

≈[tex]1.258 x 10^2^3 formula units[/tex]

Therefore, there are approximately[tex]1.258 x 10^2^3[/tex] formula units in 50.0 g of PbO2.

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How many grams of AgCl will be produced from 5.00 g of NaCl and 103 g of AgNo3

Answers

Approximately 12.27 grams mass of AgCl will be produced from 5g of NaCl and 103g of AgNO₃.

Given information,

Mass of NaCl = 5g

Mass of AgNO₃ = 103g

The number of moles of NaCl and AgNO₃:

Molar mass of NaCl = 22.99 + 35.45 = 58.44 g/mol

Number of moles of NaCl = 5.00/ 58.44 = 0.0856 mol

Molar mass of AgNO₃ = 107.87 + 14.01 ) + 3 × 16.00 = 169.87 g/mol

Number of moles of AgNO₃ = 103 / 169.87 = 0.606 mol

The stoichiometry of the balanced chemical equation between NaCl and AgNO₃:  AgNO₃ + NaCl → AgCl + NaNO₃

1 mole of AgNO₃ reacts with one mole of NaCl to produce one mole of AgCl.

For NaCl: Moles of AgCl produced from NaCl = 0.0856 mol

For AgNO₃: Moles of AgCl produced from AgNO₃ = 0.606 mol

Since NaCl produces fewer moles of AgCl, it is the limiting reactant.

Molar mass of AgCl = 107.87 + 35.45 = 143.32 g/mol

Mass of AgCl produced from NaCl = 0.0856 × 143.32 ≈ 12.27 g

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predict the products in the chemical reactions, Be+CaCl2

Answers

The reaction between beryllium (Be) and calcium chloride (CaCl2) can be represented by the following equation:

Be + CaCl2 → BeCl2 + Ca

In this reaction, beryllium (Be) displaces calcium (Ca) from calcium chloride (CaCl2) to form beryllium chloride (BeCl2) and calcium as the products.

How much energy does the water in this
experiment absorb according to the
calorimeter data?
Calorimeter Data
Mass (g)
100.0
Specific heat (J/g°C) 4.18
21.2
46.2
T₁ (J/g°C)
T, (J/g°C)
qH₂O [?] J
=

Answers

As per the data given in the question, the water in this experiment absorbs approximately 10450 joules (J) of energy according to the calorimeter data.

To determine the amount of energy absorbed by the water in the experiment (qH₂O), we need to use the formula:

qH₂O = m × c × ΔT

where:

qH₂O represents the energy absorbed by the water (in joules, J),

m is the mass of the water (in grams, g),

c is the specific heat capacity of water (in J/g°C), and

ΔT is the change in temperature of the water (in °C).

From the provided calorimeter data, we have:

Mass of the water (m) = 100.0 g

Specific heat capacity of water (c) = 4.18 J/g°C

Initial temperature (T₁) = 21.2 °C

Final temperature (T₂) = 46.2 °C

To calculate ΔT, we use the formula: ΔT = T₂ - T₁

ΔT = 46.2 °C - 21.2 °C = 25 °C

Now we can substitute the values into the formula for qH₂O:

qH₂O = (100.0 g) × (4.18 J/g°C) × (25 °C)

qH₂O ≈ 10450 J

Therefore, the water in this experiment absorbs approximately 10450 joules (J) of energy according to the calorimeter data.

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Calculate the mass percent by
volume of 281.1 g of glucose
(C6H12O6, MM = 180.2 g/mol) in
325 mL of solution.

Answers

Answer:

Given:

Mass of glucose (m) = 281.1 g

Molar mass of glucose (MM) = 180.2 g/mol

Volume of solution (V) = 325 mL

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

V = 325 mL = 325/1000 L = 0.325 L

Next, we can calculate the mass of glucose in the solution using its molar mass and the given mass:

moles of glucose (n) = m / MM

n = 281.1 g / 180.2 g/mol

Now, we need to calculate the mass percent by volume:

mass percent by volume = (mass of glucose / mass of solution) x 100

mass of solution = mass of glucose

mass percent by volume = (mass of glucose / mass of solution) x 100

= (n x MM / V) x 100

Substituting the values:

mass percent by volume = ((281.1 g / 180.2 g/mol) x 180.2 g/mol) / 0.325 L) x 100

Calculating this expression will give us the mass percent by volume of glucose in the solution.

Relations to my budget

Answers

When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

Thus, Normal definitions typically include the phrase within a relevant or appropriate range of activity since a change is likely to take place at fixed expense either an exceptionally high or low volume or expense.

Of course, the rent will probably need to adjust if sales quadruple or fall to 20% of the average level. However, as the extreme circumstances are outside of the relevant range for short-term analysis, the current rent of $2,000 is regarded as a fixed expense.)

The following are some instances of costs that are probably set within a fair range of retail sales, The yearly pay for the shop manager.

Thus, When there is an increase in an activity, like sales or manufacturing, the overall amount of an expense, known as a fixed expense, does not change.

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