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mSO2=64u
S + O2---->SO2
32g S-----64g SO2
xg S------25g SO2
x=12,5g S (siarki)
M(SO₂) = 32g/mol + 32 g/mol = 64 g/mol
n=25g/64g/mol = 0,39 mola
1 mol S ---- 1 mol SO₂
0,39 mola S ------ 0,39 mola SO₂
0,39 mola * 32g/mol = 12,5g