Answers
A complex molecule known as an organic is composed primarily of carbon atoms joined to other elements and/or other carbon atoms.
What is organic molecules?Although the distinction between "organic" and "inorganic" is disputed, many authors in the field of chemistry believe that any chemical compound that contains carbon-hydrogen or carbon-carbon bonds is considered to be an organic compound. Methane is an example of an organic compound, but opinions on whether carbon halides without hydrogen (such as carbon tetrachloride, are organic or inorganic vary from author to author.
Millions of organic substances have been identified as a result of carbon's capacity to catenate (form strands with other carbon atoms).
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Related Questions
Describe two careers in the Information and Support Services pathway and the types of technology that each job uses. What is the function of an operating system?
Answers
An operating system is a piece of software that, among other things, controls peripheral devices like disc drives and printers as well as files, memory, processes, input, and output.
What are the various information technology career paths?Architecture, information security, programming, systems, networking, analyst, development, project management, or information systems management are all possible career paths.
What three professions fall under the umbrella of health informatics?Careers in health informatics incorporate ideas and techniques from information science, computer science, and healthcare. These specialists might serve as clinical analysts, health information specialists, and managers of computer systems. They can also pursue employment in applied research and higher education.
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In the previous steps, you determined:
pre-1982 pennies contribute 1.24 g to the
overall mass
post-1982 pennies contribute 1.50 g to
the overall mass
The overall weighted average mass comes
from combining the mass contributions
from each type of penny. Add the masses
from the previous steps together to get the
overall weighted average mass.
Weighted Average -
Pre-1982 Contribution + Post-1982
Contribution
What is the weighted average mass of a
penny from this sample?
Enter
Answers
Answer:
2.74
Explanation:
Okay, let's go through the previous steps:
Pre-1982 pennies contribute 1.24 g to the overall mass
Post-1982 pennies contribute 1.50 g to the overall mass
To calculate the weighted average mass, I'll add these contributions together:
Pre-1982 contribution: 1.24 g
Post-1982 contribution: 1.50 g
Total weighted average mass = 1.24 g + 1.50 g = 2.74 g
what is Cobalt (II) iodide and sodium carbonate net ionic equation
Answers
Answer:
Co2+ + CO32- → CoCO3
Explanation:
The molecular equation for the reaction between cobalt (II) iodide and sodium carbonate is:
CoI2 + Na2CO3 → CoCO3 + 2NaI
To write the net ionic equation, we need to eliminate the spectator ions, which are the ions that appear on both the reactant and product side of the equation and do not participate in the reaction. In this case, the spectator ions are Na+ and I-.
The net ionic equation for this reaction is:
Co2+ + CO32- → CoCO3
Therefore, the net ionic equation for the reaction between cobalt (II) iodide and sodium carbonate is:
Co2+ + CO32- → CoCO3
urea, chemical formula (NH2)2CO, is used for fertilizer and many other things. calculate the number of N, C, O, and H atoms in 1.78*10^4g of urea.
Answers
The molar mass of urea can be calculated by adding up the atomic masses of its constituent elements:
Molar mass of urea = 2(14.01 g/mol N) + 2(1.01 g/mol H) + 12.01 g/mol C + 1(16.00 g/mol O)
= 60.06 g/mol
To calculate the number of moles of urea, we can divide the given mass by the molar mass:
Number of moles of urea = 1.78*10^4 g / 60.06 g/mol
= 296.26 mol
Using the chemical formula (NH2)2CO, we can see that there are 2 nitrogen atoms (N), 1 carbon atom (C), 1 oxygen atom (O), and 2 hydrogen atoms (H) in one molecule of urea.
Therefore, in 296.26 moles of urea, there are:
- 2 nitrogen atoms x 296.26 moles = 592.52 moles of N
- 1 carbon atom x 296.26 moles = 296.26 moles of C
- 1 oxygen atom x 296.26 moles = 296.26 moles of O
- 2 hydrogen atoms x 296.26 moles = 592.52 moles of H
To convert from moles to atoms, we can use Avogadro's number, which is the number of atoms in one mole of a substance:
1 mole = 6.022 x 10^23 atoms
Therefore, in 1.78*10^4g of urea, there are:
- 2 nitrogen atoms x 296.26 moles x 6.022 x 10^23 atoms/mole = 7.16 x 10^26 atoms of N
- 1 carbon atom x 296.26 moles x 6.022 x 10^23 atoms/mole = 1.79 x 10^26 atoms of C
- 1 oxygen atom x 296.26 moles x 6.022 x 10^23 atoms/mole = 1.79 x 10^26 atoms of O
- 2 hydrogen atoms x 296.26 moles x 6.022 x 10^23 atoms/mole = 7.16 x 10^26 atoms of H
Therefore, there are approximately 7.16 x 10^26 atoms of N, 1.79 x 10^26 atoms of C, 1.79 x 10^26 atoms of O, and 7.16 x 10^26 atoms of H in 1.78*10^4g of urea.
A 32.0 L cylinder containing helium gas at a pressure of 38.5 atm is used to fill a weather balloon in order to lift equipment into the stratosphere. What is the final pressure (in atm) in the cylinder after a 355 L balloon is filled to a pressure of 1.20 atm.
Answers
Answer:
Explanation:
We can use Boyle's Law, which states that the product of pressure and volume is constant for a fixed amount of gas at a constant temperature. We can use this law to find the final pressure in the cylinder after filling the balloon.
The initial pressure and volume of the helium gas in the cylinder are:
P1 = 38.5 atm
V1 = 32.0 L
The final volume of the gas after filling the balloon is:
V2 = 355 L
Using Boyle's Law, we can write:
P1V1 = P2V2
where P2 is the final pressure in the cylinder.
Solving for P2, we get:
P2 = (P1V1) / V2
Plugging in the values, we get:
P2 = (38.5 atm x 32.0 L) / 355 L
P2 = 3.48 atm
Therefore, the final pressure in the cylinder after filling the balloon is 3.48 atm.
What is the mass, in grams, of 2.45 moles of calcium atoms?
Answers
Answer:
98.20 g
Explanation:
1 mole of Ca has 40.08 g
=> 2.45 x 40.08 = 98.196 or 98.20 g
How many liters of oxygen at STP are produced
from 1759 of water?
2 Cytot 1302 → 8C02 + 10H120
Answers
Answer:
the answer is 11.2 of oxygen at STP
Use this formula for the following questions: 3CaCl2
Underline the coefficient and circle the subscript.
How many calcium atoms?
How many total atoms in the formula?
Answers
1. The number of atoms of calcium in the compound is 1.806×10²⁴ atoms
2. The total atoms in the formula is 1.806×10²⁴ atoms
1. How do i determine the number of atoms?The number of atoms in the compound can be obtained as follow:
Formula of compound = 3CaCl₂Number of mole of Ca = 3 molesNumber of atoms =?1 mole of Ca = 6.02×10²³ atoms
Therefore,
3 moles of Ca = (3 moles × 6.02×10²³ atoms) / 1 mole
3 moles of Ca = 1.806×10²⁴ atoms
Thus, the number of atoms of calcium is 1.806×10²⁴ atoms
2. How do i determine the total atoms?The total atoms in the compound can be obtained as follow:
Formula of compound = 3CaCl₂Number of mole of compound = 3 molesTotal atoms =?1 mole of CaCl₂ = 6.02×10²³ atoms
Therefore,
3 moles of CaCl₂ = (3 moles × 6.02×10²³ atoms) / 1 mole
3 moles of CaCl₂ = 1.806×10²⁴ atoms
Thus, the total atoms is 1.806×10²⁴ atoms
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What is the molar mass of argon gas (AN = 18)?
Answers
Answer:
molar mass = 79.90 g/mol
Explanation:
Argon as a gas is Ar₂. Molar mass, as found on a standard IUPAC Periodic table, located on most high school chemistry and physics textbooks, as well as data sheets in examinations, is 2×39.95 = 79.90 g/mol.
Which statement about fossil fuels is true?
_____________________________________
(any wrong/spams answers will be reported)
_____________________________________
(A) They are found deep within the earth.
(B) They do not cause pollution.
(C) They are renewable.
Answers
Explanation:
• they are found deep within earth
Answer:
A
Explanation:
fossil fuels are remains of dead plants and animals. so, they are found underground
when is an inferential control configuration needed? what do you think is its primary weakness? compare it to a simple feedback control configuration. which on is preferable?
Answers
By using inferential control, the difficult-to-measure controlled variables are approximated from certain simple process variables before being used in feedback control.
Which tool is employed to measure process variables?The two types of flow meters that are frequently used to measure the density rate of flow or velocity of a flowing fluid are the venturi meter and the orifice meter. They are also referred to as variable heading meters.
Which 5 factors are the primary process variables?An element of a physical or chemical amount that is typically monitored and managed throughout the operation of a sewage, wastewater, or industry treatment facility. Process variables like flow, level, tension, temp, turbidity, chlorine, & oxygen concentrations are frequently used.
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What is the mass of 3.5 moles of sodium hydroxide
Answers
Answer: The mass of 3,5 moles of NaOH is 139,99 g
b) The beach in Antibes, France, is composed of small, smooth rocks that have been worn
down by being tumbled against each other by the energy of the sea water
Physical or chemical?
Specific type of physical or chemical:
Answers
Answer: A
Explanation: red eye
How does sickle cell anemia effect homostasis?
What is the possibility sickle cell anemia is passed on?
How many people get this disease? How common is this disease? Who is most likley to get it?
What is the diagnosis for sickle cell anemia?
Answers
Sickle cell anemia is a genetic blood disorder that affects shape and function of red blood cells.
How does sickle cell anemia effect hemostasis?Sickle cell anemia is a genetic blood disorder that affects the shape and function of red blood cells. Hemostasis refers to process of maintaining balance between clotting and bleeding and sickle cell anemia can disrupt this balance in several ways.
One of the main effects of sickle cell anemia on hemostasis is that it can cause Vaso-occlusion, which is blockage of small blood vessels by sickle cells. This can cause tissue damage, inflammation and pain, which in turn can trigger an overactive clotting response.
Sickle cell anemia is caused by mutations in HBB gene, which provides instructions for making protein called hemoglobin.
Sickle cell anemia is most commonly found in people of African descent, although it can also occur in people of Hispanic, Middle Eastern, and Mediterranean ancestry.
Diagnosis of sickle cell anemia involves blood test to look for the presence of sickle hemoglobin.
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A client has a product that reads 75mls per serving. The client consumes 180 mls of the product which reads per serving 13.5g carbs, 10g protein, and 4g fat. How much energy has the client consumed.
Answers
Answer:
To calculate the energy consumed by the client, we need to use the following formula:
Energy (in calories) = (grams of carbohydrate x 4) + (grams of protein x 4) + (grams of fat x 9)
First, let's calculate the amount of each nutrient in the 180ml serving:
Carbohydrates: (75 ml / serving) x (13.5 g / 75 ml) x 180 ml = 32.4 g
Protein: (75 ml / serving) x (10 g / 75 ml) x 180 ml = 24 g
Fat: (75 ml / serving) x (4 g / 75 ml) x 180 ml = 9.6 g
Now we can calculate the energy consumed:
Energy = (32.4 g x 4) + (24 g x 4) + (9.6 g x 9) = 129.6 + 96 + 86.4 = 312 calories
Therefore, the client has consumed 312 calories from the 180 ml serving of the product.
In order to survive, organisms must maintain stable conditions in their bodies, even though their external environments are always changing.
For example, humans need to maintain an internal temperature around 37°C. Blood needs to have a pH around 7.4 and an oxygen saturation close to 100%.
What needs to happen in order to maintain these conditions?
A.
Organisms must be at rest.
B.
Genes must be altered each time cells replicate.
C.
Organ systems must interact with one another.
D.
all of these
Answers
A.Homeostasis Conditions inside of an organ system must remain constant, despite changes to its external environment.An organism is kept alive by numerous chemical processes.
What mechanism does the organism use to keep its surroundings stable?Homeostasis is a self-regulating process that allows an organism to retain internal stability while adapting to shifting external situations. It has emerged as the key unifying idea of physiology.
When are living things capable of maintaining constant internal conditions?The preservation of a steady internal environment is known as homeostasis.The term "homeostasis" was developed to define the chemical and physical conditions that an organism needs maintain in order for its constituent cells, tissues, organs, or organ systems to function correctly.
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Zn + 2HCl → ZnCl2 + H2
How many moles of hydrogen are produced from the reaction of 2.3 moles of zinc?
Answers
2.3 moles of zinc will produce 4.6 moles of hydrogen gas.
What is the molar ratio between zinc and hydrogen in the given chemical equation?Answer: The molar ratio between zinc and hydrogen in the given chemical equation is 1:1, which means that one mole of zinc reacts with one mole of hydrogen to produce one mole of hydrogen gas.
From the balanced chemical equation, 1 mole of Zn reacts with 2 moles of HCl to produce 1 mole of H2. Therefore, to determine the number of moles of H2 produced from 2.3 moles of Zn, we need to use stoichiometry.
1 mole of Zn → 1 mole of H2
2.3 moles of Zn → x moles of H2
x = 2.3 moles of H2
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NH3 is a weak base ( b=1.8×10−5 ) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.036
M in NH4Cl at 25 °C?
Answers
the pH of a solution that is 0.036 M in NH4Cl at 25 °C, x=5.3×10−6 M.
How acidic is a buffer that contains 0.020 M NH3 и 0.030 M NH4Cl?We obtain a pH of 9.068 and 9.07 n by dividing the logarithm of the ammonium acid concentration (0.03) by the log of a ammonia concentration (0.02).
Is NH4Cl a salt with a high acidity?Ammonia is a salt of a weak base and a strong acid, such as hydrochloric acid (like ammonium hydroxide).Ammonium chloride's formula is NH 4 Cl, hydrochloric acid's formula is and ammonium hydroxide's formula is NH 4 OH.
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H2 + Br2 → 2HBr
How many moles of bromine are produced by the synthesis of 6.9 moles of hydrobromic acid, HBr?
Answers
The moles of bromine needed to produce 6.9 moles of hydrobromic acid, HBr is 3.45 moles
How do I determine the mole of bromine needed?First, we shall write the balanced equation showing the synthesis of hydrobromic acid, HBr . This is shown below
H₂ + Br₂ -> 2HBr
From the balanced equation above,
2 moles of HBr were obtained from 1 mole of Br₂.
With the above information, we can determine the number of moles of bromine needed to produce 6.90 moles of HBr. This can be obtained as follow:
From the balanced equation above,
2 moles of HBr were obtained from 1 mole of Br₂.
Therefore,
6.90 moles of HBr will be obtain from = (6.9 × 1) / 2 = 3.45 moles of Br₂
Thus, we can conclude that number of mole needed is 3.45 moles
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Calculate the mass in grams of 4.21×1024
molecules of propylamine. The chemical formula for propylamine is C3H9N.
Answers
Answer:
413.9 grams.
Explanation:
First, we need to calculate the molar mass of propylamine (C3H9N):
Molar mass of propylamine = (3 × atomic mass of carbon) + (9 × atomic mass of hydrogen) + atomic mass of nitrogen
Molar mass of propylamine = (3 × 12.01 g/mol) + (9 × 1.01 g/mol) + 14.01 g/mol
Molar mass of propylamine = 59.11 g/mol
Next, we can use Avogadro's number to convert the number of molecules to moles:
1 mole of propylamine = 6.022 × 10^23 molecules
moles of propylamine = (4.21 × 10^24 molecules) / (6.022 × 10^23 molecules/mol)
moles of propylamine = 7.001 mol
Finally, we can use the molar mass to convert moles to grams:
mass of propylamine = moles of propylamine × molar mass of propylamine
mass of propylamine = 7.001 mol × 59.11 g/mol
mass of propylamine = 413.9 g
Therefore, the mass of 4.21×1024 molecules of propylamine is 413.9 grams.
10. For the reaction
H₂(g) + O₂(g) → H₂O(l)
H=-286 kJ/mol
What is the enthalpy change when 10.4 mol of hydrogen gas reacts with excess oxygen?
a. 27.5 kJ
b.-27.5 kJ
c. 3.64 x 10-2 J
d. -2.97 × 10³ J
e. -1.48 x 10³ J
Answers
For all the reactions, identify the reaction type and name the products formed.
1) Provide the balanced chemical equation for the complete combustion of propan-2-ol
2) 2 moles of Fluorine gas react with 2-methylpropane (provide at least two structural isomers)
3) 4-methylpent-1-ene reacts with hydrogen bromide (identify major and minor products if necessary)
MUST BE DONE ASAP 35 POINTS
Answers
Answer:
1) Reaction type: Combustion
Balanced equation: C3H8O + 5O2 → 3CO2 + 4H2O
2) Reaction type: Halogenation
Balanced equation: C4H10 + 2F2 → C4H9F + HF + F
Structural isomers of 2-methylpropane:
- 2-fluoro-2-methylpropane
- 2,2-difluoropropane
3) Reaction type: Addition
Balanced equation: C6H12 + HBr → C6H13Br
The major product is 4-bromo-4-methylpentane. The minor product is 3-bromo-4-methylpentane.
40.532 g of an unknown compound X is dissolved in 351.11 mL. What is the molarity of X? Here is some information to determine the identity of X. When 1.00g of X is dissolved in water and allowed to react wtih AgNO3, all the chlorine in X precipitates and 1.95g of AgCl is collected. When 1.00g of X undergoes complete combustion, 0.900 g of CO2 and 0.735 g of H2O were collected. The empirical and molecular formula are identical. Compound X only contains carbon, hydrogen, nitrogen, and chlorine.
Answers
1.95 g AgCl = (1.95 g AgCl) / (143.32 g/mol AgCl) = 0.0136 mol AgCl
0.0136 mol AgCl = 0.0136 mol Cl
Since we know the empirical formula and the molar mass of X is 40.532 g/mol, we can use the empirical formula to calculate the molecular formula. Let's assume that the empirical formula is CₐHᵦNᵧClᵹ:
From the combustion reaction, we can calculate the moles of carbon and hydrogen in X:
0.900 g CO2 = (0.900 g CO2) / (44.01 g/mol CO2) = 0.0205 mol CO2
0.735 g H2O = (0.735 g H2O) / (18.02 g/mol H2O) = 0.0408 mol H2O
0.0205 mol CO2 = 0.0205 mol C
0.0408 mol H2O = 0.0408 mol H
Using the law of conservation of mass, we can find the moles of nitrogen and chlorine in X:
0.0136 mol Cl = 0.0136 mol Clᵹ
0.0205 mol C + 0.0408 mol H + 0.0136 mol Clᵹ = 0.0754 mol total
0.0754 mol total = 0.0754 mol X
Now we can calculate the mole ratio of each element in X:
C: 0.0205 mol / 0.0754 mol = 0.272
H: 0.0408 mol / 0.0754 mol = 0.542
N: 0 / 0.0754 mol = 0
Cl: 0.0136 mol / 0.0754 mol = 0.181
The empirical formula is therefore C₀.₂₇H₀.₅₄N₀.₀Cl₀.₁₈.
The molar mass of the empirical formula is:
0.272 g/mol C + 0.542 g/mol H + 0.018 g/mol Cl = 0.832 g/mol
The molecular formula mass is 40
please answer fast (i will give 22 points)
Answers
Answer:
red in acid and green in a base
Explanation:
cabbage juice liquid thing is a pH indicator
1. Where would the convection currents be in this boiling pot of water?
2. What part of the water is the hottest?
3. What part of the water is the coolest?
4. Where is the water most dense?
5. Where is the water least dense?
6. Describe how the water in this pot will move?
Answers
All the questions- answers are mentioned below.
What is temperature ?
Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
What is convection currents?
By the mass motion of a fluid, such as water, air, or molten rock, convection currents move heat from one location to another. The ocean currents, atmospheric weather, and geology of the earth are all driven by the heat transfer function of convection currents.
Water boiling in a pot can be seen to have convection currents. The water is heated by the heat source at the pan's base, which also gives the water more energy and causes its molecules to flow more quickly. Water density is impacted by temperature changes as well. The water is heated by the heat source at the pan's base, which also gives the water more energy and causes its molecules to flow more quickly. Water density is impacted by temperature changes as well.
Therefore, All the questions- answers are mentioned above.
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Gaseous methane CH4 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 2.41 g of methane is mixed with 4.6 g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits.
Answers
Answer:
2.5 g
Explanation:
The balanced chemical equation for the reaction is:
CH4 + 2O2 → CO2 + 2H2O
From the equation, we can see that for every 1 mole of methane reacted, 2 moles of water are produced. Therefore, we need to first calculate the number of methane and oxygen moles in the reaction mixture.
The molar mass of methane is 16.04 g/mol, so the number of moles of methane present is:
2.41 g / 16.04 g/mol = 0.15 mol
The molar mass of oxygen is 32.00 g/mol, so the number of moles of oxygen present is:
4.6 g / 32.00 g/mol = 0.14 mol
We can see insufficient oxygen to react completely with all of the methane, so oxygen is the limiting reagent. To determine the maximum amount of water that can be produced, we need to use the number of moles of oxygen to calculate the number of moles of water produced and then convert that to a mass using the molar mass of water.
The balanced equation shows that 2 moles of water are produced for every 2 moles of oxygen. Therefore, the number of moles of water produced is:
0.14 mol O2 × (2 mol H2O / 2 mol O2) = 0.14 mol H2O
The molar mass of water is 18.02 g/mol, so the mass of water produced is:
0.14 mol H2O × 18.02 g/mol = 2.53 g
Rounding to 2 significant digits, the maximum mass of water that could be produced is 2.5 g.
A sample of the compound has 9 grams of cobalt. How many grams of fluorine does the sample have?
Answers
The mass (in grams) of fluorine the sample have is 2.91 g
How do I determine the mass of fluorine?First, we shall determine the mole of 9 grams of cobalt. Details below:
Mass of cobalt = 9 grams Molar mass of cobalt = 58.93 g/mol Mole of cobalt =?Mole = mass / molar mass
Mole of cobalt = 9 / 58.93
Mole of cobalt = 0.153 mole
Finally, we shall determine the mass of fluorine the present in the compound. Details below:
Molar mass of fluorine = 19 g/mol Mole of cobalt = 0.153 moleMole of fluorine = Mole of cobalt = 0.153 moleMass of fluorine = ?Mole = mass / molar mass
0.153 = Mass of fluorine / 19
Cross multiply
Mass of fluorine = 0.153 × 19
Mass of fluorine = 2.91 g
Thus, the mass of fluorine is 2.91 g
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Lysozyme is an enzyme that breaks bacterial cell walls. A
solution containing 0.150 g of this enzyme in 210 mL of
solution has an osmotic pressure of 0.953 torr at 25 °C.
What is the molar mass of lysozyme?
Answers
If Lysozyme is an enzyme that breaks bacterial cell walls. The molar mass is: 1.40×104 g/mol..
How to find the molar mass?Osmotic pressure (Π):
Π = M × R × T
where:
M is the molarity of the solution
R is the ideal gas constant
T is the absolute temperature.
So,
M = Π / (R × T)
Π = 0.953 torr × (0.001316 atm / 1 torr) = 0.001254 atm
R = 0.0821 atm L mol-1 K-1
T = 25.0°C + 273 = 298 K
Molarity of lysozome solution = (0.001254 atm) / (0.0821 atm L mol-1 K-1 × 298 K) = 0.00005126 mol/L
Molarity of lysozome solution = 0.00005 mol/L
(0.15 g lysozome) × (1 L soln/ 0.00005126 mol lysozome) × (1 / 0.21 L soln) = 13934.56 g/mol
Molar mass of lysozome = 13934.56 g/mol
Molar mass of lysozome = 1.40×104 g/mol.
Therefore the molar mass of lysozome is 1.40×104 g/mol.
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HELP PLSSS
the screenshot is attached. it has it all there
Answers
The balanced chemical equation for the reaction is
Cl2 + 2HO → 2HCl + O2
What is reaction ?
Reaction is a response to a situation or stimulus. It can be physical, mental, or emotional, and can range from subtle to extreme. It is a way to cope with the environment and is an important part of survival. Reactions can be conscious or unconscious and can be reflexive or voluntary. They can also be positive or negative, depending on the situation. Reactions vary depending on the individual, their experiences and their circumstances. Learning to recognize, understand, and control reactions can help people navigate challenging situations
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Calculate the following and povide the answer rounded off to the correct accuracy
(8,12-0,9800)g×(3.4501+0,16)ml
Answers
Explanation:
First, let's simplify the expression inside the parentheses:
8.12 - 0.9800 = 7.14 g 3.4501 + 0.16 = 3.6101 ml
Now we can multiply:
7.14 g x 3.6101 ml = 25.775914 g·ml
Rounding off to the correct accuracy (which is the product of the two original values), we get:
25.8 g·ml