# Problem: Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1106 -mg sample of menthol is combusted, producing 0.3112 mg of CO2 and 0.1275 mg of H2 O. What is the empirical formula for menthol?

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###### FREE Expert Solution

We’re being asked to determine the empirical formula of a compound composed of C, H, and O given the combustion analysis.

Recall that in combustion analysisa compound reacts with excess O2 to form products

For a compound composed of C, H, and O, the reaction looks like this:

CxHyOz + O2 (excess)  x CO2y H2O

This means we need to do the following steps:

Step 1: Calculate the mass of C and H in the compound.

Step 2: Calculate the mass of O in the compound.

Step 3: Determine the lowest whole number ratio of C, H, and O to get the empirical formula.

###### Problem Details

Menthol, the substance we can smell in mentholated cough drops, is composed of C, H, and O. A 0.1106 -mg sample of menthol is combusted, producing 0.3112 mg of CO2 and 0.1275 mg of H2 O. What is the empirical formula for menthol?