Stoichiometry Quiz

What is the primary concept at the heart of every stoichiometry problem?

• Mole ratio

• Mass ratio

• Volume ratio

• Temperature ratio

In a mole-mole stoichiometry problem, if 9.66 moles of CO2 are produced, how many moles of aluminum carbonate were initially present?

• 3.22 moles

• 9.66 moles

• 28.98 moles

• 1.00 mole

What is the first step in solving a mass-mass stoichiometry problem?

• Find the limiting reactant

• Convert moles to mass

• Use the mole ratio

• Convert mass to moles

How many grams of CO2 are produced from 85.96 grams of aluminum carbonate?

• 234 grams

• 85.96 grams

• 48.49 grams

• 44 grams

In a reaction with multiple reactants, what determines the amount of product formed?

• Excess reactant

• Total mass of reactants

• Limiting reactant

• Temperature of reaction

If 12.07 grams of sodium react with 17.89 grams of chlorine, which is the limiting reactant?

• Both are limiting

• Sodium chloride

• Sodium

• Chlorine

What is the theoretical yield of sodium chloride if 17.89 grams of chlorine are used?

• 17.89 grams

• 30.70 grams

• 29.48 grams

• 12.07 grams

How is percent yield calculated in a chemical reaction?

• (Theoretical yield / Actual yield) x 100

• (Theoretical yield - Actual yield) x 100

• (Actual yield / Theoretical yield) x 100

• (Actual yield + Theoretical yield) / 2

What was the percent yield if 25.75 grams of product were actually produced, but 29.48 grams were expected?

• 87.36%

• 100%

• 75%

• 110%

Why is it difficult to achieve 100% yield in a typical high school chemistry lab?

• Product loss due to various reasons

• All of the above

• Inaccurate measurements

• Lack of proper equipment