Question 1

What is the molar mass of N₂O?

Accepted Answer

A) 30 g/mole 
B) 30 u 
C) 44 g/mole 
D) 44 u 
A) 30 g/mole 
B) 30 u 
C) 44 g/mole 
D) 44 u

Question 2

How many moles of sulfur atoms are present in 4.00 moles of CS₂?

Accepted Answer

A) 2.00 
B) 4.00 
C) 8.00 
D) 12.00 
A) 2.00 
B) 4.00 
C) 8.00 
D) 12.00

Question 3

When 2 liter of nitrogen gas reacts with 6 liters of hydrogen gas at constant temperature and pressure,how many liters of ammonia gas will be produced?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
A) 2 
B) 4 
C) 6 
D) 8

Question 4

According to Avogadro's hypothesis,equal volumes of gases at the same temperature and pressure will have the same number of molecules.

Accepted Answer

A) True 
 B)False

Question 5

The number of moles of NaOH that are in 250 mL of a 3.0 molar solution is

Accepted Answer

A) 0)25 moles. 
B) 0)75 moles. 
C) 1)0 moles. 
D) 1)5 moles. 
A) 0)25 moles. 
B) 0)75 moles. 
C) 1)0 moles. 
D) 1)5 moles.

Question 6

What is the mass of 0.500 mol of NH₃?

Accepted Answer

A) 8)50 g 
B) 3)40 g 
C) 7)50 g 
D) 34.0 g 
A) 8)50 g 
B) 3)40 g 
C) 7)50 g 
D) 34.0 g

Question 7

Calculate the number of moles of sodium hydroxide present in 300 mL of a 2.0 M solution of sodium hydroxide.

Accepted Answer

A) 600 moles of sodium hydroxide 
B) 0)60 moles of sodium hydroxide 
C) 300 moles of sodium hydroxide 
D) 2)0 moles of sodium hydroxide 
A) 600 moles of sodium hydroxide 
B) 0)60 moles of sodium hydroxide 
C) 300 moles of sodium hydroxide 
D) 2)0 moles of sodium hydroxide

Question 8

When the equation below is balanced,the coefficient of silver nitrate is:
Cu + AgNO₃ → Cu(NO₃)₂ + Ag

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3

Question 9

A four molar solution of NaOH in water contains

Accepted Answer

A) four moles of NaOH per liter of solution. 
B) four grams of NaOH per liter of solution. 
C) four liters of NaOH per mole of solution. 
D) four moles of NaOH per mole of solution. 
A) four moles of NaOH per liter of solution. 
B) four grams of NaOH per liter of solution. 
C) four liters of NaOH per mole of solution. 
D) four moles of NaOH per mole of solution.

Question 10

Ammonia can be prepared by the reaction of magnesium nitride with water.The products are ammonia and magnesium hydroxide.When the equation is written and balanced,the coefficient of ammonia is

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 6 
A) 1 
B) 2 
C) 3 
D) 6

Question 11

The observations that gaseous reactants combine to form gaseous products in volume ratios that are simple whole numbers is most directly summarized by which of the following.

Accepted Answer

A) The Law of Conservation of Mass 
B) The Law of Fixed Proportions 
C) The Law of Multiple Proportions 
D) The Law of Combining Volumes 
A) The Law of Conservation of Mass 
B) The Law of Fixed Proportions 
C) The Law of Multiple Proportions 
D) The Law of Combining Volumes

Question 12

The percent atom economy is a measure of the proportion of the reactant atoms that become part of the desired product.

Accepted Answer

A) True 
 B)False

Question 13

The following reaction is important in the removal of sulfur dioxide,a major source of acid rain,from the smokestacks of coal burning power plants.When the equation below is balanced,the coefficient of calcium sulfate (commonly called "gypsum")is:
CaO + SO₂ + O₂ → CaSO₄

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 14

A one molar solution is a solution that contains one mole of solute in

Accepted Answer

A) one mole of solvent. 
B) one liter of solution. 
C) one kilogram of solvent. 
D) one kilogram of solution. 
A) one mole of solvent. 
B) one liter of solution. 
C) one kilogram of solvent. 
D) one kilogram of solution.

Question 15

Which of the following does NOT contain Avogadro's number of particles?

Accepted Answer

A) 1)0 mole of silver 
B) 23 g of sodium 
C) 6)02 × 10²³ atoms of aluminum 
D) 12 g of water 
A) 1)0 mole of silver 
B) 23 g of sodium 
C) 6)02 × 10²³ atoms of aluminum 
D) 12 g of water

Question 16

What mass of KOH is needed to make 400.0 mL of 0.725 M KOH?

Accepted Answer

A) 31.0 g 
B) 101.7 g 
C) 40.6 g 
D) 16.3 g 
A) 31.0 g 
B) 101.7 g 
C) 40.6 g 
D) 16.3 g

Question 17

Which of the following contains as many atoms as 18 g of water,H₂O?

Accepted Answer

A) one mole of nitrogen, N₂ 
B) three moles of zinc, Zn 
C) two moles of sodium chloride, NaCl 
D) two moles of nitrogen, N₂ 
A) one mole of nitrogen, N₂ 
B) three moles of zinc, Zn 
C) two moles of sodium chloride, NaCl 
D) two moles of nitrogen, N₂

Question 18

Balance the equation: C₃H₈ + O₂ → CO₂ + H₂O

Accepted Answer

C₃H₈ + 5 O

Question 19

Consider the following equation: 2 Na + 2 H₂O → 2 NaOH + H₂
Identify the product(s)for this reaction.

Accepted Answer

A) Na 
B) Na and H₂O 
C) NaOH 
D) NaOH and H₂ 
A) Na 
B) Na and H₂O 
C) NaOH 
D) NaOH and H₂

Question 20

You can balance a chemical equation by changing the formula of a reactant or a product.

Accepted Answer

A) True 
 B)False

Exam 5: Chemical Accounting

What is the molar mass of N₂O?

How many moles of sulfur atoms are present in 4.00 moles of CS₂?

When 2 liter of nitrogen gas reacts with 6 liters of hydrogen gas at constant temperature and pressure,how many liters of ammonia gas will be produced?

According to Avogadro's hypothesis,equal volumes of gases at the same temperature and pressure will have the same number of molecules.

The number of moles of NaOH that are in 250 mL of a 3.0 molar solution is

What is the mass of 0.500 mol of NH₃?

Calculate the number of moles of sodium hydroxide present in 300 mL of a 2.0 M solution of sodium hydroxide.

When the equation below is balanced,the coefficient of silver nitrate is: Cu + AgNO₃ → Cu(NO₃)₂ + Ag

A four molar solution of NaOH in water contains

Ammonia can be prepared by the reaction of magnesium nitride with water.The products are ammonia and magnesium hydroxide.When the equation is written and balanced,the coefficient of ammonia is

The observations that gaseous reactants combine to form gaseous products in volume ratios that are simple whole numbers is most directly summarized by which of the following.

The percent atom economy is a measure of the proportion of the reactant atoms that become part of the desired product.

The following reaction is important in the removal of sulfur dioxide,a major source of acid rain,from the smokestacks of coal burning power plants.When the equation below is balanced,the coefficient of calcium sulfate (commonly called "gypsum")is: CaO + SO₂ + O₂ → CaSO₄

A one molar solution is a solution that contains one mole of solute in

Which of the following does NOT contain Avogadro's number of particles?

What mass of KOH is needed to make 400.0 mL of 0.725 M KOH?

Which of the following contains as many atoms as 18 g of water,H₂O?

Balance the equation: C₃H₈ + O₂ → CO₂ + H₂O

Consider the following equation: 2 Na + 2 H₂O → 2 NaOH + H₂ Identify the product(s)for this reaction.

You can balance a chemical equation by changing the formula of a reactant or a product.

Chemistry

Atoms

Atomic Structure

Chemical Bonds

Gases, Liquids, Solids, and Intermolecular Forces

Acids and Bases

Oxidation and Reduction

Organic Chemistry

Polymers

Nuclear Chemistry

Chemistry of the Earth

Air

Water

Energy

Biochemistry

Food

Drugs

Fitness and Health

Chemistry Down on the Farm

Household Chemicals

Poisons

Filters