Объяснение:
Н2О2 =1×2+16×2=34
Н3РО4=3×1 + 31+ 4×16=98
Na2CO3=2× 23 +12+16×3= 106
CO2=12 +16×2=44
SO3=32+ 16×3=80
Mg(OH)2=24+ 16×2+1×2=58
FeO=56+16=72
Fe2O3=56×2+16×3=160
N2O= 14×2+16=44
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Объяснение:
Н2О2 =1×2+16×2=34
Н3РО4=3×1 + 31+ 4×16=98
Na2CO3=2× 23 +12+16×3= 106
CO2=12 +16×2=44
SO3=32+ 16×3=80
Mg(OH)2=24+ 16×2+1×2=58
FeO=56+16=72
Fe2O3=56×2+16×3=160
N2O= 14×2+16=44