Respostas

2013-09-17T23:29:32-03:00
Pela Equação de Clapeyron temos:

p*V = n*R*T

sendo R = 0,082 atm*L*mol^-1*K^-1

1cm³ = 1*10^-3dm³ = 1*10^-3 Litros

100Pa = 10^-3 atm

10^-3*10^-3 = n * 0,082 * 220

10^-6 = n * 18,04

10^-6 / 18,04 = n

*********************************************
n =~ 5,5*10^-8 mols aproximadamente
*********************************************

1 mol ----------------------- 6,02 * 10^23 moléculas
5,5*10^-8 mols ------------- x

******************************************************
x = 33,11 * 10^15 = 3311 * 10^13 moléculas
******************************************************