Calculate the percentage by mass of the indicated element in the following compounds.
carbon in acetylene, c2h2 , a gas used in welding.
express your answer using three significant figures.

The mass percent of carbon in acetylene is 92.31 %.

Explanation:

In , there are 2 carbon atoms and 2 hydrogen atoms.

To calculate the mass percent of element in a given compound, we use the formula:

Mass of carbon =

Mass of acetylene =

Putting values in above equation, we get:-

Hence, the mass percent of carbon in acetylene is 92.31 %.

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