a) C5H12(l) +O2(g) → CO2(g) +H2O(l)
If 28.6 grams of pentane (C5H12) areburned in excess oxygen, how many grams of H2O will beproduced?
____________g H2O
b) If baking soda (sodiumhydrogen carbonate) is heated strongly, the following reactionoccurs:
2NaHCO3(s) → Na2CO3(s) +H2O(g) + CO2(g)
Calculate the mass of sodium carbonate that will remain if a1.28 g sample of sodium hydrogen carbonate is heated
___________Â Â g Na2CO3
c) P2O5(s) + 3H2O(l) →2H3PO4(aq)
Given an initial mass of 10.35 gP2O5, an excess ofH2O (assuming that all of the reactantis converted to product(s), and none is lost), calculate the mass(g) of H3PO4 produced by thereaction.
__________ g
d)
\"Smelling salts,\" which are used to revive someone who hasfainted, typically contain ammonium carbonate,(NH4)2CO3. Ammonium carbonatedecomposes readily to form ammonia, carbon dioxide, and water. Thestrong odor of the ammonia usually restores consciousness in theperson who has fainted. The unbalanced equation is
(NH4)2CO3(s) →NH3(g) + CO2(g) + H2O(g)
Calculate the mass of ammonia gas that is produced if 1.30 g ofammonium carbonate decomposes completely.
______ g NH3
