## Chemistry and Chemical Reactivity (9th Edition)

From the text: Compound's volume: $15.3-8.5 = 6.8\ mL = 6.8\ cm^3$ Compound's mass: 18.82 g Then, the density is given by: $\rho=18.82\div6.8=2.8\ g/cm^3$ The closest answer is KBr with $2.75\ g/cm^3$