pV=nRT => n=(pV)/(RT) = 0.008 moli
760 mmHg ... 1 atm
737 mmHg ... p atm ; p = 0.96 atm
V=220/1000 L = 0.22 L
T = 25 + 273.15 = 298.15
=> 1 mol gaz in conditii normala ocupa 22.4 L
0.008 mol gaz in c.n. = x L
x=0.1792 L
0.008 mol ... 0.1792 L
y mol ... 1 L
y=0.044 mol
daca 0.008 mol ... 0.5584 g
1 mol ... M(masa moleculare a gazului)
M=69.8 g/mol
=> masa unui litru din gazul A in c.n. este: 0.044*69.8= 3.0712 g