Chemistry-stoichiometry revision exercises

Stoichiometry revision exercises

1) Ammonia is formed when hydrogen reacts with nitrogen according to the equation below.

3H₂(g) + N₂(g) => 2NH₃(g)

If 24 grams of hydrogen react what mass of nitrogen gas should also react?
Place your answer in the text box below. No decimal places should be given.

2) Aluminium reacts with hydrochloric acid according to the reaction below.
2Al(s) + 6HCl(aq) => 2AlCl₃(aq) +3H₂(g)
If 6 X 10²⁴atoms of aluminium react what mass of hydrogen gas is produced?
No decimal places should be given in the answer. (Al=27, Cl=35, H=1)

3) If 54 grams of aluminium reacts with hydrochloric acid (as per question 2) above) what mass of aluminium chloride is produced? (Al=27, Cl=35, H=1)
No decimal places should be given in the answer.

4) Aluminium oxide is formed when aluminium metal reacts with oxygen gas according to the equation below.
4Al(s) + 3O₂(g) => 2Al₂O₃(s)
If 0.408 Kg of aluminium oxide was produced what mass of aluminium reacted?
(Al=27, Ol=16) No decimal places should be given in the answer.

5) Sucrose burns in oxygen to produce carbon dioxide and water according to the equation below.

C₆H₁₂O₆(s) + 6O₂(g) => 6CO₂(g) + 6H₂O(l)
If 6.0 X 10²⁴ oxygen molecules reacted how many grams of sucrose reacted?
(C=12, O=16, H=1)

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