1) NH3MNH3NH3NH3 = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol
2) N2MN2N2N2 = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol
3) COMCOCOCO = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol
4) CO2MCO2CO2CO2 = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol
1) NH3
MNH3NH3NH3 = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol
2) N2
MN2N2N2 = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol
3) CO
MCOCOCO = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol
4) CO2
MCO2CO2CO2 = 7 x MHeHeHe = 7 x 4g/mol = 28g/mol