Quiz about Stoichiometry Mole to Mole

Question 1

How many moles of water can be produced if 6.5 moles H₂ are used?

Accepted Answer

6.5 moles

Answer

4 moles

Answer

16 moles

Answer

2 moles

Question 2

Given the reaction: 4Al + 3O₂ --> 2Al₂O₃

How many moles of Aluminum oxide, Al₂O₃, can you produce if you have 2 moles of Al?

Accepted Answer

1 mole

Answer

3 mole

Answer

2 mole

Answer

0.5 mole

Question 3

How many moles of ethane (C₂H₆) are required to produce 13.5 moles of water from the above reaction?

Accepted Answer

4.5 mol C₂H₆

Answer

27 mol C₂H₆

Answer

40.5 mol C₂H₆

Answer

81 mol C₂H₆

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

Which of the following best describes the mole concept?

Accepted Answer

A measure of the amount of substance

Answer

A measure of mass

Answer

A measure of volume

Answer

A measure of temperature

Question 6

Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 7

If 10 grams of $$H_2$$ are used in the reaction $$2H_2 + O_2 ightarrow 2H_2O$$ , how many moles of $$H_2$$ are there? (Molar mass of $$H_2 = 2 \, ext{g/mol}$$ )

Accepted Answer

5 moles

Answer

2 moles

Answer

10 moles

Answer

20 moles

Question 8

Calculate the number of moles in 3.13 x 10²⁰ atoms Zn.

Accepted Answer

2.53 x 10⁵ mol Zn

Answer

1.88 x 10⁴⁴ mol Zn

Answer

5.2 x 10^-4 mol Zn

Answer

2.05 x 10^-4 mol Zn

Question 9

Which of the following dimensional analysis setups will correctly convert 4.00x10²³atoms of cobalt to moles of cobalt? How many moles of colbalt are there?

Accepted Answer

setup A : 0.664 mol Co

Answer

setup B : 0.664 mol Co

Answer

setup A: 2.41x10⁴⁷mol Co

Answer

setup B: 2.41x10⁴⁷mol Co

Question 10

How many moles are in 22 grams of carbon dioxide ( $$CO_2$$ )? (Molar mass of $$CO_2$$ is 44 g/mol)

Accepted Answer

0.5 moles

Answer

1 mole

Answer

2 moles

Answer

3 moles

Question 11

How many grams are in 3.30 mol of potassium sulfide?

Accepted Answer

363 g

Answer

454 g

Answer

238 g

Answer

132 g

Question 12

In the reaction $$2H_2 + O_2 \rightarrow 2H_2O$$ , how many moles of $$H_2O$$ are produced when 4 moles of $$H_2$$ are reacted completely?

Accepted Answer

4 moles

Answer

1 mole

Answer

2 moles

Answer

8 moles

Question 13

A chemical reaction requires 0.5 moles of sulfuric acid (H $$_2$$ SO $$_4$$ ). How many grams of H $$_2$$ SO $$_4$$ are needed? (Molar mass of H $$_2$$ SO $$_4$$ = 98 g/mol)

Accepted Answer

49 grams

Answer

98 grams

Answer

24.5 grams

Answer

196 grams

Question 14

Calculate the number of moles in 88 grams of carbon dioxide ( $$CO_2$$ ). (Molar mass of $$CO_2$$ = 44 g/mol)

Accepted Answer

2 moles

Answer

1 mole

Answer

0.5 moles

Answer

4 moles

Question 15

What is the first thing you must do to solve a stoichiometry problem?

Accepted Answer

Ratio

Answer

write down all substances

Answer

add all together

Answer

adjust the mole amounts

Question 16

How many moles of S₈ is needed to produce 12 moles of SO₃?

Accepted Answer

1.5

Answer

1

Answer

2

Answer

12

Question 17

In the reaction $$2H_2 + O_2 \rightarrow 2H_2O$$ , how many moles of $$O_2$$ are needed to completely react with 4 moles of $$H_2$$ ?

Accepted Answer

2 moles

Answer

1 mole

Answer

3 moles

Answer

4 moles

Question 18

Given the reaction $$C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O$$ , how many moles of $$CO_2$$ are produced when 2 moles of $$C_3H_8$$ are burned?

Accepted Answer

6 moles

Answer

2 moles

Answer

3 moles

Answer

4 moles

Question 19

In the reaction $$4Fe + 3O_2 \rightarrow 2Fe_2O_3$$ , how many moles of $$Fe_2O_3$$ are produced from 8 moles of $$Fe$$ ?

Accepted Answer

4 moles

Answer

1 mole

Answer

2 moles

Answer

3 moles

Question 20

How many moles of $$H_2O$$ are produced when 5 moles of $$C_2H_6$$ react with excess $$O_2$$ in the reaction $$2C_2H_6 + 7O_2 \rightarrow 4CO_2 + 6H_2O$$ ?

Accepted Answer

15 moles

Answer

5 moles

Answer

10 moles

Answer

20 moles

Stoichiometry Mole to Mole

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