5.01 Stoichiometry Part 1 Quiz

1. 20g of calcium is burned in excess oxygen, what is the mass of calcium oxide produced?
Ar [Ca = 40 O = 16]

2. A 0.8 M solution was diluted to a final volume of 500 mL. If the new concentration is 0.2 M then how much water was added to the original solution?

3. 90 grams of glucose is burned in a closed container which contains 80 grams of oxygen gas. Which of the following are true of this reaction?

Ar [H = 1                    C = 12                            O = 16]

I: Oxygen is the limiting reactant

II: There will be more carbon dioxide molecules produced than water molecules produced

III: There will be more oxygen molecules produced than glucose molecules produced

4. A 0.75 litre sodium chloride solution with concentration 0.5 M is diluted with water so that it now takes up 1.5 litres. What concentration would this solution have?

5. A container holds 0.5 moles of H₂ gas. How many hydrogen atoms are present in the container?

6. A mixture contains 60% NaCl. If we have 2.9 kg of the mixture, then how much sodium can be extracted?

[Ar:      Na = 23             Cl = 35]

7. What mass of sulphur dioxide is required to make a 5 dL solution of concentration 4.0 mol/L?

[Ar:        O = 16                      S = 32]

8. A 100cm³ solution of HCl has a concentration of 0.5 M. What is the concentration if 300cm³ is added?