a) How many milliliters of carbon dioxide gas at STP are produced from the decomposition of 5.00 g of iron(III) carbonat

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a) How many milliliters of carbon dioxide gas at STP areproduced from the decomposition of 5.00 g of iron(III)carbonate?
Fe2(CO3)3(s)→Fe2O3(s)+3 CO2(g)
b) How many grams of mercury(II) oxide decompose togive 50.0 mL of oxygen gas at STP according to theequation
2 HgO(s)→2 Hg(l)+O2(g)
c) Assuming the same temperature and pressure foreach gas, how many milliliters of oxygen gas react with 10.0 mL ofcarbon monoxide?
2 CO(g)+O2(g)→2 CO2(g)