Quiz about Gram to Mole Stoichiometry

Question 1

How many steps will it take me to convert units from grams of compound A to grams of compound B?

Accepted Answer

3

Answer

4

Answer

2

Answer

1

Question 2

I use molar mass to convert to moles when the problem gives me grams?

Accepted Answer

True

Answer

False

Question 3

How do I convert from grams to moles?

Accepted Answer

divide by molar mass

Answer

multiply by molar mass

Answer

multiply by Avogadro's number

Answer

divided by Avogadro's number

Question 4

How many grams of $$H_2O$$ are produced when 4 moles of $$H_2$$ react with excess $$O_2$$ in the reaction $$2H_2 + O_2 \rightarrow 2H_2O$$ ? (Molar mass of $$H_2O$$ is 18 g/mol)

Accepted Answer

72 g

Answer

18 g

Answer

36 g

Answer

54 g

Question 5

Given the reaction , how many grams of are produced from 245 grams of ? (Molar mass of is 122.5 g/mol, molar mass of is 32 g/mol)

Accepted Answer

96 g

Answer

32 g

Answer

48 g

Answer

64 g

Question 6

Given the reaction $$2KClO_3 \rightarrow 2KCl + 3O_2$$ , how many grams of $$O_2$$ are produced from 245 grams of $$KClO_3$$ ? (Molar mass of $$KClO_3$$ is 122.5 g/mol, molar mass of $$O_2$$ is 32 g/mol)

Accepted Answer

96 g

Answer

32 g

Answer

48 g

Answer

64 g

Question 7

How many grams of potassium chloride can be produced from 356 grams potassium bromide?

Accepted Answer

225 g

Answer

749 g

Answer

479 g

Answer

814 g

Question 8

How much aluminum would be needed to react with 45 grams of O₂?

Accepted Answer

50.6 g

Answer

28.5 g

Answer

71.1 g

Answer

60 g

Question 9

How many grams of aluminum sulfate would be formed if 250 g H₂SO₄ completely reacted with aluminum?

Accepted Answer

290 g

Answer

0.85 g

Answer

450 g

Answer

870 g

Question 10

How do I convert from moles to grams?

Accepted Answer

multiply by molar mass

Answer

divide by molar mass

Answer

multiply by Avogadro's number

Answer

divided by Avogadro's number

Question 11

In solving a mass-mass (gram to gram) conversion, it is necessary to convert to the given mass to moles.

Accepted Answer

true

Answer

false

Question 12

What is the first step in converting grams to moles in a stoichiometry problem?

Accepted Answer

Identify the molar mass of the substance

Answer

Use Avogadro's number

Answer

Balance the chemical equation

Answer

Convert moles to grams

Question 13

In the reaction @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O} $$, how many moles of $$ ext{H}_2 ext{O} $$ are produced from 4 grams of $$ ext{H}_2 $$? (Molar mass of $$ ext{H}_2@@ is 2 g/mol)

Accepted Answer

2 moles

Answer

1 mole

Answer

4 moles

Answer

8 moles

Question 14

How do you calculate the number of moles from a given mass?

Accepted Answer

Divide the mass by the molar mass

Answer

Multiply the mass by the molar mass

Answer

Multiply the mass by Avogadro's number

Answer

Divide the mass by Avogadro's number

Question 15

What is the molar mass of water (H2O)?

Accepted Answer

18 g/mol

Answer

20 g/mol

Answer

22 g/mol

Answer

24 g/mol

Question 16

Given the reaction @@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O} $$, how many grams of $$ ext{CO}_2 $$ are produced from 44 grams of $$ ext{C}_3 ext{H}_8 $$? (Molar mass of $$ ext{C}_3 ext{H}_8 $$ is 44 g/mol, molar mass of $$ ext{CO}_2@@ is 44 g/mol)

Accepted Answer

88 g

Answer

44 g

Answer

132 g

Answer

176 g

Question 17

What is the role of a balanced chemical equation in stoichiometry?

Accepted Answer

It shows the ratio of moles of reactants and products

Answer

It provides the molar masses of reactants and products

Answer

It determines the speed of the reaction

Answer

It identifies the limiting reactant

Question 18

In a stoichiometry problem, why is it important to convert grams to moles?

Accepted Answer

To use the mole ratio from the balanced equation

Answer

To find the limiting reactant

Answer

To calculate the reaction rate

Answer

To determine the theoretical yield

Question 19

How many grams of $$ ext{NaCl}$$ are produced from 2 moles of $$ ext{Na}$$ reacting with excess $$ ext{Cl}_2$$ ? (Molar mass of $$ ext{NaCl}$$ is 58.5 g/mol)

Accepted Answer

117 g

Answer

58.5 g

Answer

234 g

Answer

292.5 g

Question 20

What is the molar mass of carbon dioxide (CO2)?

Accepted Answer

44 g/mol

Answer

12 g/mol

Answer

32 g/mol

Answer

56 g/mol

Question 21

In the reaction @@ ext{2KClO}_3 ightarrow 2KCl + 3O}_2 $$, how many moles of $$ ext{O}_2 $$ are produced from 245 grams of $$ ext{KClO}_3 $$? (Molar mass of $$ ext{KClO}_3@@ is 122.5 g/mol)

Accepted Answer

3 moles

Answer

1 mole

Answer

2 moles

Answer

4 moles

Question 22

What is the purpose of using Avogadro's number in stoichiometry?

Accepted Answer

To convert moles to molecules

Answer

To convert grams to moles

Answer

To balance chemical equations

Answer

To determine reaction rates

Question 23

How many grams of $$ ext{H}_2$$ are needed to produce 36 grams of $$ ext{H}_2 ext{O}$$ in the reaction @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O} $$? (Molar mass of $$ ext{H}_2 $$ is 2 g/mol, molar mass of $$ ext{H}_2 ext{O}@@ is 18 g/mol)

Accepted Answer

8 g

Answer

2 g

Answer

4 g

Answer

6 g

Question 24

What is the significance of the mole ratio in a balanced chemical equation?

Accepted Answer

It shows the proportion of reactants and products

Answer

It determines the mass of reactants

Answer

It identifies the limiting reactant

Answer

It calculates the reaction rate

Gram to Mole Stoichiometry

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