The compound dihydroxyacetone (DHA) is used in “sunless” tanning lotions, which darken the...

The compound dihydroxyacetone (DHA) is used in “sunless” tanning lotions, which darken the skin by reacting with the amino acids in the outer surface of the skin. A typical drugstore lotion contains 4.0% (mass/volume) DHA.

a. Draw the condensed structural formula for DHA.

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b. Identify the functional groups in DHA.

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c. What are the molecular formula and molar mass of DHA?

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d. A bottle of sunless tanning lotion contains 177 mL of lotion. How many milligrams of DHA are in a bottle?