What is the mass percent of carbon in dimethyl sulfoxide, C₂H₆SO?

Question

Quizplus · Accepted Answer

The molecular formula for dimethyl sulfoxide is $C_2H_6SO$. To find the mass percent of carbon, first calculate the molar mass of the compound: $2 \times 12.01$ (carbon) + $6 \times 1.008$ (hydrogen) + $32.07$ (sulfur) + $16.00$ (oxygen) = $78.13 \, \text{g/mol}$. The mass of carbon in the compound is $2 \times 12.01 = 24.02 \, \text{g}$. The mass percent of carbon is $\frac{24.02}{78.13} \times 100\% = 30.7\%$.

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