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M Cu = 63,55 g/mol
M CuSO4.5H2O=159,62 + 90,08 = 249,7 g/mol
25% - 63,55
100% - x
x = 254,2 g
254,2 -- 100%
249,7 --- y %
y = 98,23 %
Zadanie 2.
M N = 14,01 g/mol
M NH4NO3 = 80,052 g/mol
30% -- 2 x 14,01
100% --- x
x = 93,4
100% - 93,4
y % --- 80,052
y = 85,7 %
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