NO= 30
HCl=36.5
H2O=18
CaO=56
Na2O=62
NO - 30
HCl - 36,5
H₂O - 18
CaO - 56
Na₂O - 62
Объяснение:
Mr(NO) = 1*Ar(N) + 1*Ar(O) = 1*14 + 1*16 = 30
Mr(HCl) = 1*Ar(H) + 1*Ar(Cl) = 1*1 + 1*35,5 = 36,5
Mr(H₂O) = 2*Ar(H) + 1*Ar(O) = 2*1 + 1*16 = 18
Mr(CaO) = 1*Ar(Ca) + 1*Ar(O) = 1*40 + 1*16 = 56
Mr(Na₂O) = 2*Ar(Na) + 1*Ar(O) = 2*23 + 1*16 = 62
