The limiting reactant determines how much of the excess reactant is used.
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73. During the reaction C + 2H₂ → CH₄, 18 g of carbon and 10 g of hydrogen are reacted. The mass of methane formed is
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75. In the reaction 2Al + 6HCl → 2AlCl₃ + 3H₂, 5.4 g of aluminium and 21.9 g of HCl are mixed. The volume of hydrogen at STP produced is