Answer to Question #170900 in General Chemistry for Twaambo Lwiindi

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 cylinder displaces (74.04g$-$ 66.11g)of water.

=7.93g of water.

Volume of Cylinder =$\frac{Mass of displaced water} {Density}$

$=\frac{7.93g}{0.998g/cm^{3}}$

Volume=7.9459cm$^{3}$

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

$=\frac{74.04g}{7.9459cm^{3}} =9.318g/cm^{3}$