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0,25mol - 1dm^3
x - 0,5dm^3
x=0,125mol
1mol w warunkach normalnych zajmuje 22,4dm^3, więc:
1mol - 22,4dm^3
0,125mol - y
y=2,8dm^3
2.
x/(200+x)*100%=10%
100x=10x + 2000
90x = 2000
x=22,22g
3.
5% * 50g = 5g
MHCL=36,5g/mol
36,5g- 1mol
5g - x
x=0,137mol
1mol - 22,4dm^3
0,137mol - y
y=3,0688dm^3