Question

A student found that a brass cylinder weighs 75.04 g in air and 66.11 g in water (density is 0.998 g/cm3). What is the density of brass?

Answer 1

The space occupied by water ;

(74.04g-66.11g)=7.93g

Volume =$\frac{Mass of displaced water} {Density}$ =$\frac{7.93g}{0.998g/cm^{3} }$

Volume =7.9459$cm^{3}$

Volume of Brass =$\frac{Weight of the cylinder} {Volume}$

$=\frac{74.04g}{7.9459cm^{3}}$

$=9.318g/cm^{3}$