Answer
Caffeine
Work Step by Step
Given $$\begin{aligned}
\text{mass}& = 0.384 \text{ g}\\
\text{volume}& = 0.32 \text{ cm}^{3}
\end{aligned}$$ We use the formula for density: $$\begin{aligned}
\text{density}& = \frac{\text{mass}}{\text{volume}}\\
&=\frac{0.384\text{ g}}{0.32\text{ cm}^3}\\
&=1.2\text{ g/cm}^3.
\end{aligned}$$ Based on density the other compound is Caffeine.
