What is the molecular formula of each compound?

(a) Empirical formula $\mathrm{CH}_{2}(M=42.08 \mathrm{g} / \mathrm{mol})$

(b) Empirical formula $\mathrm{NH}_{2}(\mathscr{M}=32.05 \mathrm{g} / \mathrm{mol})$

(c) Empirical formula $\mathrm{NO}_{2}(\mathscr{M}=92.02 \mathrm{g} / \mathrm{mol})$

(d) Empirical formula CHN $(M=135.14 \mathrm{g} / \mathrm{mol})$

## Discussion

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## Recommended Questions

Write the empirical formula corresponding to each of the following molecular formulas: (a) $\mathrm{Al}_{2} \mathrm{Br}_{6},(\mathbf{b}) \mathrm{C}_{8} \mathrm{H}_{10}$ (c) $\mathrm{C}_{4} \mathrm{H}_{8} \mathrm{O}_{2},(\mathbf{d}) \mathrm{P}_{4} \mathrm{O}_{10},(\mathbf{e}) \mathrm{C}_{6} \mathrm{H}_{4} \mathrm{Cl}_{2},(\mathbf{f}) \mathrm{B}_{3} \mathrm{N}_{3} \mathrm{H}_{6} .$

What is the molecular formula of each of the following compounds?

$$

\begin{array}{l}{\text { (a) empirical formula } \mathrm{HCO}_{2} \text { , molar mass }=90.0 \mathrm{g} / \mathrm{mol}} \\ {\text { (b) empirical formula } \mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}, \text { molar mass }=88.0 \mathrm{g} / \mathrm{mol}}\end{array}

$$