If 21.39 g  acetylene is allowed to completely react with oxygen, how many grams of o2 are reacted? (the molar mass of acetylene is 26.04 g/mol)2 c2h2(g) + 5 o2(g) → 4 co2(g) + 2 h2o(g)acetylenebe sure to use the p

65.712 grams of oxygen has reacted.

Explanation:

Mass of acetylene = 21.39 g

Moles of acetylene =

According to reaction , 2 moles of acetylene reacts with 5 moles of oxygen gas.

Then 0.8214 moles of oxygen gas will react with :

of oxygen gas.

Mass of 2.0535 moles of oxygen gas :

2.0535 mol × 32 g/mol = 65.712 g

65.712 grams of oxygen has reacted.

i believe the answer is 5,000

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