Stoichiometry revision exercises Excess and limiting reactants 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 with 28 grams of nitrogen what mass of ammonia gas is produced? Place your answer in the text box below. No decimal places should be given. grams 2) Aluminium reacts with hydrochloric acid according to the reaction below. 2Al(s) + 6HCl(aq) => 2AlCl3(aq) +3H2(g) If 6.0 X 1024 atoms of aluminium react with 360 grams of HCl what mass of hydrogen gas is produced. No decimal places should be given in the answer. (Al=27, Cl=35, H=1) grams 3) If 54 grams of aluminium reacts with 360 grams of 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. grams 4) Aluminium oxide is formed when aluminium metal reacts with oxygen gas according to the equation below. 4Al(s) + 3O2(g) => 2Al2O3(s) If 0.324 Kg of aluminium was reacted with 0.32Kg of oxygen gas what mass of aluminium oxide is formed? (Al=27, Ol=16) No decimal places should be given in the answer. grams 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 with 2.4 X 1023 sucrose molecules how many grams of carbon dioxide will be produced? (C=12, O=16, H=1) grams

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