Question

определить массовую долю каждого элемента Li2SO4

Answer 1

Mr(Li2SO4) = 7*2 + 32 + 16*4 = 110

W(Li) = Ar(Li)*n / Mr(Li2SO4) *100% = 7*2 / 110 *100% = 13%

W(S) = Ar(S) *n / Mr(Li2SO4) *100% = 32*1 / 110 *100% = 29%

W(O) = Ar(O) *n / Mr(Li2SO4) *100% = 16 *4 / 110 *100% = 58%