Ответ:
Объяснение:
Mr(P2O5) = 2Ar(P)+5Ar(O) = 2*31 + 5*16 = 142
w(E) = nAr(E)/Mr
w(P) = 2*31/142 = 0,4366 або 43,66%
w(O) = 5*16/142 = 0.5634 або 56,34%
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Ответ:
Объяснение:
Mr(P2O5) = 2Ar(P)+5Ar(O) = 2*31 + 5*16 = 142
w(E) = nAr(E)/Mr
w(P) = 2*31/142 = 0,4366 або 43,66%
w(O) = 5*16/142 = 0.5634 або 56,34%