Problem: 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.

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Mass % C:


% mass C=mass C in C2H2molar mass C2H2 ×100

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Problem Details

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.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mass Percent Formula concept. You can view video lessons to learn Mass Percent Formula. Or if you need more Mass Percent Formula practice, you can also practice Mass Percent Formula practice problems.