Question

Найти массовую долю элемента

Answer 1

Ответ:

Mr(KNO3) = 40+14+48=102

W(K) = 40:102= 0.39x100=39%

W(N) = 14:102 = 0.137 = 0.14x100=14%

W(O) = 100%-(39+14) = 47%

Answer 2

Ответ:

Объяснение:

Mr(KNO3) = 39 + 14 + 16*3 =62

W(K) = Ar(K) *n / Mr(KNO3)  *100% = 39*1 / 62  *100% =63%

W(N) = Ar(N) *n / Mr(KNO3)  *100% = 14*1 / 62  *100% =23%

W(O)= Ar(O) *n / Mr(KNO3)  *100% = 16*3 / 62  *100% =14%