Classify each of the following chemical reactions as a synthesis decomposition and single displacement or double displacement reaction

Taking into account the ideal gas law, a mass of 0.00314 grams of H₂ is collected.

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

In this case, you know:

Replacing in the ideal gas law:

0.985526 atm× 0.039 L = n× 0.082 (atm×L)÷(mol×K)× 298 K

Solving:

[0.985526 atm× 0.039 L]÷ [0.082 (atm×L)÷(mol×K)× 298 K]= n

0.00157 moles= n

Considering that the molar mass of H₂ is 2 g/mole, the mass can be calculated as:

mass= number of moles× molar mass

mass= 0.00157 moles× 2 g/mole

mass= 0.00314 grams

Finally, you collected a mass of 0.00314 grams.

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We have the next compounds

And we must classify them as alkane, alkene, alkyne.

We need to know that

- Alkane: They are the simplest hydrocarbons, containing only carbon and hydrogen held together by single bonds.

- Alkene: Alkenes are hydrocarbons that contain a double bond.

- Alkyne: Alkynes are hydrocarbons that contain a triple bond.

1. We can see that the structure has a double bond. So, it is an Alkene.

2. We can see that the structure has a triple bond. So, it is an Alkyne.

3. We can see that the structure has a double bond. So, it is an Alkene.

4. We can see that the structure has a triple bond. So, it is an Alkyne.

ANSWER:

1. Alkene

2. Alkyne

3. Alkene

4. Alkyne

Answer:

Ammonium hydroxide. Ammonium hydroxide is an inorganic herbicide, fungicide and microbiocide.It is non-volatile and highly soluble in water.

Explanation:

According to the concept of solubility, ammonium hydroxide is insoluble in water.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Hello

To solve this question, we should understand that an element is is the base form in which a particule exit. However, it can either be in a molecule, atom or in a compound. Elements are pure substance which form up the molecule, atom or compounds. An element can said to be an identity of a substance. Elements are generally classified using the periodic table into metals, non-metals, metalliods.

In this question, the most possibe defination is that an element is a pure substance

A homogenous mixture is a mixture that is said to have one phase of substance throughout. I.e the comprising substance are all in a single phase.

A solution is the mixture of a solute that is completely dissolved in a solvent.

A heterogeneous mixture is a solution that the substance are not in a single phase.

The answer to this question is option B

Answer

0.9166 g CO

Procedure

Considering the conditions and parameters given ideal gas law will be assumed.

The gas constant is 8.3144 L⋅kPa⋅ K⁻¹⋅mol⁻¹

Converting the current data to the required units

710 mL = 0.710 L

37 °C = 310.15 °K

Solving for moles and substituting the variables with the available data

Transforming from moles to grams using the molecular weight

Answer:

reactants /products, products / reactants, opposite / inverse

I can't exactly tell how many underscores there are.

Explanation:

This is biology, but it does contain chemistry.

When a metal atom combines with a nonmetal atom, the nonmetal atom will gain electrons and decrease in size

In a reaction between metals and non-metals, electrons are moved from the metal atoms to the non-metal atoms, resulting in the formation of ions. An ionic compound is the name given to the resulting substance.

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Answer:

Explanation:

Here, we want to get the number of moles

Mathematically:

The number of moles in the question would be:

We work here with Charles' Law. The equation used here is:

V1/T1 = V2/T2 (1)

(pressure and amount constant)

V is for volume and T for temperature

V1 = 1785 mL

1 L = 1000 mL ==> V1 = 1.785 L

T1 = 25 °C = 25 °C + 273 = 298 K

V2 = 1.25 L

T2 = unknown

From (1) we clear T2:

T2 = V2 x T1/V1 = 1.25 L x 298 K/1.785 L = 209 K approx.

T2 = 209 K - 273 = -64 °C

Answer: T2 = -64 °C

The relationship between n, ℓ, and the total number of nodes is given by the expression; Number of spherical nodes = n - ℓ - 1.

The number of nodes has to do with the points on the orbital where there is a zero electron density. It is the points along the orbital where there re no electrons. Recall that the orbitals are the regions in space where there is a high probability of finding an electron.

There are various orbitals and the number of nodes of each of the orbitals does vary. The s orbital has no nodes while the p orbital is known to have one node.

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Answer:

Explanation:The given reaction is

It is an example of an oxidation reaction because in the above reaction, is getting oxidized to form .

Also, it is a type of combination reaction because magnesium reacts with oxygen to form a single product i.e. Magnesium oxide.

We must take into account the definition of pH, and this represents the concentration of H+ ions([H+]). It can be defined with the following equation:

To determine how many times the acid is stronger than the tomato, we must calculate the concentration of H+ ions for each pH value, to do so we clear [H+] from the previous equation:

Now we substitute each pH value into the equation:

Therefore we will have to:

Therefore, stomach acid will be 1000 times stronger than the tomatoes.

The products of the double displacement reactions are given in the equations of the reaction below:

a. 3 Sn(OH)₂ (aq) + 2 FeBr₃ (aq) ---> 3 SnBr₂ (aq) + 2 Fe(OH)₃ (s)

Iron (iii) hydroxide is obtained as a precipitate

b. CsNO₃ (aq) + KCI (aq) ---> CsCl (aq) + KNO₃ (aq)

No double displacement reaction occurs as both products are soluble.

Double displacement reactions are reactions in which there is an exchange of radicals by two compounds when solutions of the compounds are added together.

In a double displacement reaction, an insoluble precipitate is obtained since one of the products of the double displacement reaction is insoluble in aqueous solutions.

The products of the double displacement reactions are given in the equations of the reaction below:

a. Reaction between Sn(OH)₂ and FeBr₃

3 Sn(OH)₂ (aq) + 2 FeBr₃ (aq) ---> 3 SnBr₂ (aq) + 2 Fe(OH)₃ (s)

Iron (iii) hydroxide is obtained as a precipitate

b.  Reaction between CsNO₃ and KCI

CsNO₃ (aq) + KCI (aq) ---> CsCl (aq) + KNO₃ (aq)

No double displacement reaction occurs as both products are soluble.

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ANSWER

EXPLANATION

Given that;

The mass of Al2(SO4)3 is 500 grams

The mass of Ca(OH)2 is 450 grams

The mass of CaSO4 is 596 grams

Follow the steps below to find the limiting reactant of the reaction

Step 1; Write the balanced equation of the reaction

In the reaction above, 1 mole Al2(SO4)3 reacts with 3 moles Ca(OH)2 to give 2 moles Al(OH)3 and 3 moles CaSO4

Step 2; Determine the number of moles using the below formula

Recall, that the molar mass of Al2(SO4)3 is 342.15 g/mol and the molar mass of Ca(OH)2 is 74.093 g/mol

For Al2(SO4)3

For Ca(OH)2

Step 3; Find the limiting reactant of the reaction

To find the limiting reactant of the reaction, divide the moles of the reactant by the co-efficient of the compound

Since the limiting reactant of the reaction is the reactant with the lowest number of mol/wt, then Al2(SO4)3 is the limiting reactant

The excess reactant of the reaction is Ca(OH)2

Therefore, the no of moles of the excess reactant that is unreacted is

6.073 - 1.461 = 4.612 moles

Hence, the number of moles of the excess reactant that is unreacted is 4.621 moles

Answer

mass of oxygen = 22.54 g

Explanation

Given:

4 Fe + 3 O2 = 2 Fe2O3

Mass of Fe203 = 75 g

Required: Mass of O2

We know:

Molar mass of Fe2O3 = 159,69 g/mol

Molar mass of O2 = 31.998 g/mol

Solution:

Step 1: Calculate the moles of Fe2O3

n = m/M where n is the moles, m is the mass and M is the molar mass

n = 75g/159,69 g/mol

n = 0.469 mol

Step 2: Use the stoichiometry to find the moles of O2

The molar ratio between Fe2O3 and O2 is 2:3

Therefore moles of O2 = 0.469 mol x (3/2) = 0.704 mol

Step 3: Find the mass of O2

m = n x M

m = 0.704 mol x 31.998 g/mol

m = 22.54 g

A mixture in Chemistry is defined as a material made up of two or more different chemical substances, and it will not present a homogeneous solution, but instead a heterogeneous appearance, just like a vegetable soup, which is a mixture of many substances, answer letter D

Answer:

Example:

Here, we want to get the kcal of energy contained in the cheeseburger

To do this, we multiply the caloric values of each food type by their masses and then sum

Mathematically, we have that as:

To the nearest tens, we have that as 360 kcal

Given Data:

Concentration of acid, H2SO4 = 2.59 M

For, H2SO4, n-factor = 2, i.e., the number of [tex]H^{+}[/tex] ions on dissociation

Thus, the concentration in normality, N1 = 2.59 x 2 = 5.18 N

Concentration of base, KOH = 0.827 M

For, KOH, n-factor = 1, i.e., the number of [tex]OH^{-}[/tex] ions on dissociation

Thus, the concentration in normality, N2 = 0.827 x 1 = 0.827 N

Volume of  base, V2 = 47.50 mL

Using the formula, N1 x V1 = N2 x V2, where, V1 = volume of acid

Thus, volume of acid required to neutralize, V1 = [tex]\frac{N_{2}X V_{2} }{N_{1} }[/tex] =  [tex]\frac{0.827 X 47.50}{5.18}[/tex]

                                                                               = 7.58 mL.

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The shape and bond angle of the molecule will be, H2S =shape= bent, Bond angle =less than 109 degrees

2) CH4 = shape = tetrahedral

bond angle-=109 degrees

1)H2S =shape= bent

Bond angle =less than 109 degrees

2) CH4 = shape = tetrahedral

bond angle-=109 degrees

3) HCN = shape = Linear

Bond angle = 180 degrees

4) NF3 = shape = trigonal planar

Bond angle = less than 109 degrees

5) BCl3 = shape = trigonal planar

Bond angle = 120 degrees

6) NH2Cl = shape = trigonal pyramidal

Bond angle = 107  degrees

7) OF2 = shape = linear

Bond angle = 109 degrees

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The bulk properties of a substance (macroscopic) such as electrical conductivity can be caused by the microscopic such as electrical forces in the atoms through the movement of free electrons.

This is referred to as the measure or the degree in which a substance conducts electricity and how the electric current moves within a substance.

The electrical conductivity which is macroscopic can be caused by the microscopic such as electrical forces as a result of the electrons moving in the body. The movement of the electron is usually from the negative to the positive terminal of the body.

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A solution of Calcium Chloride was made, we are asked to find the concentration of the initial solution.

We will apply the following equation to find it:

Where,

C1 is the initial concentration we have to find

V1 is the initial volume, 45mL

C2 is the final concentration, 0.182M

V2 is the final volume, 50. mL

We clear C1 and replace the known data;

The molarity of the stock solution is 0.202M

Answer: 0.202M

Collecting hair samples from multiple places on the body is most likely to be done during an autopsy.

This is referred to as a post-mortem examination which is done on a corpse so as to determine the cause of the sickness and for appropriate actions to be taken.

Hair is easily dispersed as a result of light weight and structure and its ability to easily attach to other substances. The hair will be most likely taken during this procedure, it helps to identify the race and sex of the suspect. It can also be used to identify the suspect through DNA analysis which is therefore the reason why option C was chosen as the correct choice.

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Answer: C

Explanation:

The energy from the sun heats up the water in the tank by convection and radiation.

We know that heat is that which is able to effect a temperature change in an object. Now, we know that there are three forms of heat transfer and these are;

1) Conduction

2) Convection

3) Radiation

Now, we know that radiation is the movement of heat without a medium of propagation. Heat from the sun reaches the tank by radiation. The molecules that are at the surface are first heated up and sink down while the heavier particles below move up. This is called convection.

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The electron releases energy in the form of light.

Hope this helps!

The mass of quinine in the original tonic water sample is 37.8 mg.

The concentration of the diluted sample with a fluorescence intensity of 73.7 is calculated using the formula of Lambert-Beer's law as follows:

C₁/C₂ = A₁/A₂

where:

C₁ = 25 ppm or 25 mg/L

C₂ = ?

A₁ = 195

A₂ = 73.7

C₂ = 73.7 * 25 / 195

C₂ = 9.45 mg/L

To concentration of the original sample will be determined from the dilution formula:

C₁V₁ = C₂V₂

where;

C₁ = ?

V₁ = 25. 0 mL

C₂ = 9.45 mg/L

V₂ = 200 mL

C₁ = 9.45 * 200 / 25

C₁ = 75.6 mg/L

The volume of the stock sample was 500 mL or 0.5 L

The mass of quinine = 75.6 mg/L * 0.5 L

mass of quinine = 37.8 mg

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Answer

Only the hydrogen atom attached to the oxygen atom is capable of forming hydrogen bonds. A dipole does not form between the hydrogen and the carbon atoms.

Explanation

The description of the hydrogen bonds in an ethanol molecule is that hydrogen bonding can occur between ethanol molecules, although not as effectively as in water. The hydrogen bonding is limited by the fact that there is only one hydrogen in each ethanol molecule with a sufficient δ+ charge.

Therefore only the hydrogen atom attached to the oxygen atom is capable of forming hydrogen bonds. A dipole does not form between the hydrogen and the carbon atoms.

The second option is the correct answer.

When we have a mixture of gases, the pressure exerted by each depends on the number of moles present in the mixture, this contribution is called partial pressure. The sum of the partial pressures will be equal to the total pressure, this is called Dalton's law.

Partial pressure can be described by the following equation:

Where,

Pi is the partial pressure

Xi is the molar fraction

Pt is the total pressure

The molar fraction is calculated by the following equation:

Where,

ni is the number of moles of the substance

nT is the total number of moles.

So, we have to find first the number of moles of each gas. We are given the grams of gases, to get the equivalent moles we must divide the mass by the molar mass.

Molar Mass N2=28.0134g/mol

Molar Mass O2=31.9988g/mol

Now, the partial pressure of N2 will be:

If we assume that the gas behavior is like an ideal gas, we can find the total pressure with the following equation:

Where,

n is the total number of moles, 0.069mol

R is a constant, 0.08206atm.L/mol.K

V is the volume of the gas, 1.51L

T is the temperature of the gas, K.284.15K

We replace the known data:

Now, the partial pressure of nitrogen will be:

Answer: The partial pressure of N2 is 0.69atm

Answer:

The objective of agricultural chemistry is to preserve or improve the fertility of soil, increase the agricultural yield and improve the quality of the crop. To reach those objectives the agricultural industry uses two types of chemicals.

- Fertilizers: increase soil fertility making crops more productive. They usually are compounds that contain three basic elements: P, K and N.

- Pesticides: control weeds (herbicides), insects (insecticides) and diseases from fungus (fungicides).

Answer:

0.124 M.

Explanation:

What is given?

Volume 1 (V1) = 239 mL,

Concentration 1 (C1) = 0.274 M,

Volume 2 (V2) = 239 mL + 288 mL = 527 mL.

What do we need? Concentration 2 (C2).

Step-by-step solution:

To solve this problem, we have to use the following formula:

Where the initial concentration (C) and volume (V) are represented with subindex 1, and the final concentration and volume are represented with subindex 2.

The problem is telling us that we are adding 288 mL of water to 239 mL, so the final volume is the sum of these two volumes, i.e., 527 mL.

As we want to find the final concentration, C2, we just have to solve for this unknown value and replace the values that we have, like this:

The answer would be that the final concentration of the solution is 0.124 M.

Electronic configuration: this shows us the distribution of electrons in an atom. The chart below helps us find the electron configuration.

How many protons does argon have?

Argon has 18 protons.

The electronc configuration of argon is 1s2 2s2 2p6 3s2 3p6