Question

HCl (g) + O2 Cl2 (g) + H2O (g)

Answer 1

PV = nRT

Pressure times volume = number of moles times ideal gas constant times temperature

50mL = .05L

1 atm (.05) = n (.0821) (273)

.05 = n (22.4133)

.022 = n (number of moles)

6.022E23 molecules = 1 mole

.022 x 6.022E23 = 1.325E23 molecules