98 грамм
Объяснение:
Mr(Ba(NO3)2) = 137 + 14*2 + 16*6 = 261
W(O) = Ar(O) *n / Mr(Ba(NO3)2) *100% = 16*6 / 261 *100% =37%
Mr(Ca3(PO4)2 =40*3 + 31*2 + 16*8 =310
W(O) = Ar(O) *n / Mr(Ca3(PO4)2) *100% = 16*8 / 310 *100% =41%
Mr(Al2(SO4)3) = 27*2+32*3 +16*12 =342
W(O) = Ar(O) *n / Mr(Al2(SO4)3) *100% = 16*12 / 342 *100% =56%
Mr(Ca(NO3)2 = 40 + 14*2 + 16*6 =164
W(O) = Ar(O) *n / Mr(Ca(NO3)2 *100% = 16*6 / 164 *100% = 58,5%
Mr(Na2SO4) = 23*2 + 32 + 16*4 = 142
W(Na) = Ar(Na) *n / Mr(Na2SO4) *100% = 23*2 / 142 *100% =32%
W(S) = Ar(S) *n / Mr(Na2SO4) *100% = 32*1 / 142 *100% =22%
W(O) = Ar(O) *n / Mr(Na2SO4) *100% = 16*4 / 142 *100% =46%
Mr(Ba(NO3)2) = 137 + 14*2 + 16*6 = 261
W(Ba) = Ar(Ba) *n / Mr(Ba(NO3)2) *100% = 137 *1 / 261 *100% = 52%
W(N) = Ar(N) *n / Mr(Ba(NO3)2 *100% = 14*2 / 261 *100% =11%
W(O) = Ar(O) *n / Mr(Ba(NO3)2) *100% = 16*6 / 261 *100% = 37%
