a)
Ar(Mg) = 24,305
Ar(Na) = 22,990
Ar(K) = 39,098
Ar(AI) = 26,982
Ar(Zn) = 65,39
Ar(Ca) = 40,078
Ar(Fe) = 55,847
Ar(Li) = 6,941
Ar(Ag) = 107,868
Ar(Au) = 196,967
b)
Mr[NaCl] = Ar[Na] + Ar[Cl] = 22.98976928 + 35.453 = 58.44276928≈58
Mr[Ca(OH)2] = Ar[Ca] + Ar[O] * 2 + Ar[H] * 2 = 40.078 + 15.9994 * 2 + 1.00794 * 2 = 74.09268≈74
Mr[Al(OH)3] = Ar[Al] + Ar[O] * 3 + Ar[H] * 3 = 26.9815386 + 15.9994 * 3 + 1.00794 * 3 = 78.0035586≈78
Mr[Na2SO4] = Ar[Na] * 2 + Ar[S] + Ar[O] * 4 = 22.98976928 * 2 + 32.065 + 15.9994 * 4 = 142.04213856≈142
АРСI и МeNO3 что это?
Объяснение:
a)
Ar(Mg) = 24,305
Ar(Na) = 22,990
Ar(K) = 39,098
Ar(AI) = 26,982
Ar(Zn) = 65,39
Ar(Ca) = 40,078
Ar(Fe) = 55,847
Ar(Li) = 6,941
Ar(Ag) = 107,868
Ar(Au) = 196,967
b)
Mr[NaCl] = Ar[Na] + Ar[Cl] = 22.98976928 + 35.453 = 58.44276928≈58
Mr[Ca(OH)2] = Ar[Ca] + Ar[O] * 2 + Ar[H] * 2 = 40.078 + 15.9994 * 2 + 1.00794 * 2 = 74.09268≈74
Mr[Al(OH)3] = Ar[Al] + Ar[O] * 3 + Ar[H] * 3 = 26.9815386 + 15.9994 * 3 + 1.00794 * 3 = 78.0035586≈78
Mr[Na2SO4] = Ar[Na] * 2 + Ar[S] + Ar[O] * 4 = 22.98976928 * 2 + 32.065 + 15.9994 * 4 = 142.04213856≈142
АРСI и МeNO3 что это?
Объяснение: