Объяснение:
Mr(Na2SO4) = 23*2+32+16*4 = 142
Mr(N2O5) = 14*2 + 16*5 = 108
W(N) = Ar(N) * n / Mr(N2O5) *100% = 14*2 / 108 *100% =26%
W(O) = Ar(O) *n / Mr(N2O5) *100% = 16*5 / 108 *100% = 74%
Объяснение:
Mr(Na2SO4) = 23*2+32+16*4 = 142
Mr(N2O5) = 14*2 + 16*5 = 108
W(N) = Ar(N) * n / Mr(N2O5) *100% = 14*2 / 108 *100% =26%
W(O) = Ar(O) *n / Mr(N2O5) *100% = 16*5 / 108 *100% = 74%