Question

Cine ma poate ajuta la ex1 si 2?

Answer 1

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