4. Stoichiometry

Mole Relationships — Quiz

Test your understanding of mole relationships with 5 practice questions.

Practice Questions

Question 1

In the reaction $C_2H_6 + \frac{7}{2}O_2 \rightarrow 2CO_2 + 3H_2O$, how many grams of water (H_2O) are produced from 2 moles of ethane (C_2H_6)? (Molar mass of H_2O = 18 g/mol)

Question 2

In the reaction $4NH_3 + 5O_2 \rightarrow 4NO + 6H_2O$, how many moles of oxygen gas (O_2) are required to react completely with 8 moles of ammonia (NH_3)?

Question 3

In the reaction $2C_3H_8 + 10O_2 \rightarrow 6CO_2 + 8H_2O$, how many liters of carbon dioxide (CO_2) are produced at STP from 1 mole of propane (C_3H_8)? (Molar volume at STP = 22.4 L/mol)

Question 4

In the reaction $2K + 2H_2O \rightarrow 2KOH + H_2$, how many grams of potassium hydroxide (KOH) are produced from 1 mole of potassium (K)? (Molar mass of KOH = 56.1 g/mol)

Question 5

In the reaction $Fe_2O_3 + 3CO \rightarrow 2Fe + 3CO_2$, how many moles of iron (Fe) are produced from 2 moles of carbon monoxide (CO)?