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Problem 41

What is the molecular formula of each compound? (a) Empirical formula $\mathrm{CH}(\mathscr{M}=78.11 \mathrm{g} / \mathrm{mol})$ (b) Empirical formula $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{2}(\mathscr{M}=74.08 \mathrm{g} / \mathrm{mol})$ (c) Empirical formula $\mathrm{HgCl}(\mathscr{M}=472.1 \mathrm{g} / \mathrm{mol})$ (d) Empirical formula $\mathrm{C}_{7} \mathrm{H}_{4} \mathrm{O}_{2}(\mathscr{M}=240.20 \mathrm{g} / \mathrm{mol})$

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## Recommended Questions

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}

$$

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

$$

\begin{array}{l}{\text { (a) empirical formula } \mathrm{CH}_{2}, \text { molar mass }=84.0 \mathrm{g} / \mathrm{mol}} \\ {\text { (b) empirical formula } \mathrm{NH}_{2} \mathrm{Cl} \text { , molar mass }=51.5 \mathrm{g} / \mathrm{mol}}\end{array}

$$

From the given molar mass and empirical formula of several compounds, find the molecular formula of each compound.

\begin{equation}\begin{array}{l}{\text { a. } \mathrm{C}_{4} \mathrm{H}_{9}, 114.22 \mathrm{g} / \mathrm{mol}} \quad \text { b. } \mathrm{CCl}, 284.77 \mathrm{g} / \mathrm{mol} \\ {\text { c. } \mathrm{C}_{3} \mathrm{H}_{2} \mathrm{N}, 312.29 \mathrm{g} / \mathrm{mol}}\end{array}

\end{equation}

Oleic acid has the empirical formula

$\mathrm{C}_{9} \mathrm{H}_{17} \mathrm{O} .$ If the experimental molar mass is

$282 \mathrm{g} / \mathrm{mol},$ what is the molecular formula of

oleic acid?