Chemistry

Problem

As the ratio of the molecular formula to the empirical formula is always a whole number, the molecular formula can also be calculated from the empirical formula if the molar mass is known. Deduce the molecular formula of the following substances: a. Empirical formula

P_2O_5

and a molar mass of

283.88 \text{ g mol}^{-1}

b. Empirical formula

CH_2

and a molar mass of

70.15 \text{ g mol}^{-1}

c. Empirical formula

CH_2O

and a molar mass of

60.06 \text{ g mol}^{-1}

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