Answer to Question #93265 in General Chemistry for Amber Dennis

Question

How many atoms of mercury are present in 5 cubic centimeters of liquid mercury? The desity of mercury is 13.55 g/cc

Answer 1

$\bold{Given:}\\ Hg\\ V = 5 cm^3\\ \rho = 13.55 g/cm^3\\[1ex] \bold{Find:}\\ N = \ ??\\[3ex] N = \nu N_A = \dfrac{mN_A}{M} = \dfrac{\rho VN_A}{M} = \dfrac{13.55g/cm^3*5cm^3*6.02*10^{23}mol^{-1}}{200.59 g/mol} \approx 2.0333*10^{23}\\[1ex] \bold{Answer:} \ 2.0333*10^{23} \ atoms$