Răspuns:
pV=niuRT. unde niu=m/miu
pV=mRT/miu----> miu=mRT/pV
V=0,5L
m=0,35g
p=270/760atm=0,355 atm deoarece la 1atm corespund 760mmHg
T=273+87=360k
miu= 0,35x0,082x360/0,355x0,5=58g/mol
V=1000 L
p=1,5atm
t=273+27=300K
miu=32g/mol
m= pVmiu/RT=1,5X1000x32/0,082X300 g=1951g
xplicație: