Hitunglah massa dari: 1. 4 mol O2 2. 2 mol N2 3. 20 mmol Cl2 4. 15 mmol CO (NH2)2

Massa = mol x Mr
1) Mr O2 = 32
massa O2 = 4 mol x 32 g/mol = 128 gram
2) Mr N2 = 28
massa N2 = 2 mol x 28 g/mol = 56 gram
3) Mr Cl2 = 71
massa Cl2 = 20 mmol x 71 mg/mmol = 1420 mg = 1,42 gram
4) Mr CO(NH2) = 60
massa CO(NH2) = 15 mmol x 60 mg/mmol = 900 mg = 0,9 gram
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