Calculation of the mass fraction of a chemical element in C2H6 compounds

univerkov | August 8, 2021 | education

The mass fraction of each chemical element in the C2H6 substance will be equal to the ratio of the mass of carbon or hydrogen in the C2H6 molecule to the mass of the C2H6 molecule, expressed in%.

1. Molecular weight of C2H6 substance: 12 * 2 + 1 * 6 = 30 g.

2. Mass of carbon: 12 * 2 = 24 g; mass of hydrogen: 1 * 6 = 6 g.

3. For carbon, the mass fraction is: (24/30) * 100% = 80%.

For hydrogen, the mass fraction is: (6/30) * 100% = 20%.

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