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Calculati masa moleculara pentru substantele Na2-O,Zn-O,Al2-O,Mg-O,Ba-O

Răspuns :

Moonlight01
MNa2O=2ANa+O=2*23+16=62g/mol

MZnO=AZn+AO=65+16=81g/mol

Al2O3 = 2AAl+3AO=2*27+3*16=102g/mol

MgO = AMg+AO = 24+16=40g/mol

BaO = ABa+O=137+16=153g/mol

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