Zadanie 9
M K=39 g/mol
M O=16 g/mol
110 g/mol---100%
xg/mol---70,91%
x=78 g/mol
110g/mol-78 g/mol=32 g/mol
78 g/mol:39 g/mol=2 atomy K
32 g/mol:16 g/mol=2 atomy O
Wzór: K2O2
Zadanie 10
32u 80u
2Mg+O2--->2MgO
xg 4g
32u---80u
xg---4g
x=1,6 g
68u 32u
2H2O2--->2H2O+O2
xg 1,6g
68u---32u
xg---1,6g
x=3,4 g
Zadanie 11
56g 1mol
CaO+H2O--->Ca(OH)2
xg 0,5 mol
56g---1 mol
xg---0,5 mol
x=28 g
