The combustion of the alkyne propyne,  releases heat when it burns according to the follow...

The combustion of the alkyne propyne,  releases heat when it burns according to the following equation:

a. How many moles of water are produced from the complete reaction of 64.0 g of oxygen?

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b. How many moles of oxygen are needed to react completely with 2.25 × 1024 molecules of propyne?

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c. How many grams of carbon dioxide are produced from the complete reaction of 78.0 g of propyne?

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d. If the reaction in part c produces 186 g of CO2, what is the percent yield for the reaction?