Acetylene reacts with oxygen to form carbon dioxide and water according to the following unbalanced reaction:

c2h2 (g) + o2 (g) → co2 (g) + h2o (g)

if we start with 38.7 g of acetylene and 13.7 g of oxygen, how many grams of the excess reactant are leftover after the reaction is complete?

report your answer to three significant figures.

Mass of excess reactant leftover after reaction is complete = 34.2 g .

Explanation:

Acetylene reacts with oxygen to form carbon dioxide and water, equation given is unbalanced

Firstly equation is balanced:

:

Here we come to know O2 is limiting reactant as it gives smaller amount of So is excess reactant.

Mass of excess reactant utilized:

Mass of excess reactant leftover after reaction is complete:

.

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