1)
oxid de calciu = CaO
clorura desodiu = NaCl
bromura demagneziu = MgBr2
sulfura de poatsiu = K2S
sulfura dealuminiu = Al2S3
clorura de aluminiu = AlCl3
iodura de calciu = CaI2
2)
CaO
40x1+16x = 56 g/mol
NaCl
23x1+35,5x1 = 58,5 g/mol
MgBr2
24x1+80x2 = 184 g/mol
K2S
39x2+32x1 = 110 g/mol
Al2S3
27x2+32x3 = 150 g/mol
AlCl3
27x1+35,5x3 = 133,5 g/mol
CaI2 = 40x1+127x2 = 294 g/mol