Объяснение:
Mr(SO3) = 32 + 16*3 = 80
W(S) = Ar(S) *n / Mr(SO3) *100% = 32*1 / 80 *100% =40%
W(O) = Ar(O) *n / Mr(SO3) *100% = 16*3 / 80 *100% = 60%
Mr(NaCl) = 23 + 35,5 = 58,5
W(Na) = Ar(Na) *n / Mr(NaCl) *100% = 23 *1 / 58,5 *100% =39%
W(Cl) = Ar(Cl) *n / Mr(NaCL) *100% = 35,5 *1 / 58,5 *100% = 61%
Mr(MgO) = 24+16 = 40
W(Mg) = Ar(Mg) *n / Mr(MgO) *100% = 24*1 / 40 *100% = 60%
W(O) = Ar(O) *n / Mr(MgO) *100% = 16*1 / 40 *100% = 40%
