A hydrocarbon contains 85.7% Carbon. If its molecular weight is 28, how many Carbon atoms are in the — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
A hydrocarbon contains 85.7% Carbon. If its molecular weight is 28, how many Carbon atoms are in the molecular formula?
Answer: 2
💡 Solution & Explanation
$\text{Mass of C} = 0.857 \times 28 \approx 24\text{ g}$. <br>$\text{Atoms of C} = 24 / 12 = 2$. <br>Formula is $C_2H_4$.
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