FREE RPAL Stoichiometry Questions and Answers

Question 1

What does stoichiometry primarily deal with in a chemical reaction?

Accepted Answer

The quantitative relationships between reactants and products

Answer

The speed of the reaction

Answer

The energy released during the reaction

Answer

The color change in the reaction

Question 2

In the balanced equation 2H₂ + O₂ → 2H₂O, how many moles of water are produced from 3 moles of oxygen?

Accepted Answer

6 moles

Answer

3 moles

Answer

4 moles

Answer

2 moles

Question 3

What is the mole ratio of aluminum (Al) to aluminum oxide (Al₂O₃) in the reaction 4Al + 3O₂ → 2Al₂O₃?

Accepted Answer

4:2

Answer

2:3

Answer

3:4

Answer

1:1

Question 4

In the reaction 2Na + Cl₂ → 2NaCl, how many grams of NaCl can be produced from 46 grams of Na (atomic mass of Na = 23 g/mol)?

Accepted Answer

92 grams

Answer

23 grams

Answer

46 grams

Answer

184 grams

Question 5

If you have 10 grams of H₂ and 80 grams of O₂, which is the limiting reactant in the reaction 2H₂ + O₂ → 2H₂O?

Accepted Answer

H₂

Answer

O₂

Answer

H₂O

Answer

None, they are in perfect ratio