Odpowiedź:
CaCl2=111u
Ca= 40u
Cl=35,5u*2=71u
111u----100%
71u----x
x~64%
Cl=64%
Ca=36%
--------------------------
Na2S=78u
Na=23u*2=46u
S=32u
78u------100%
46u------y
y~59%
Na=59%
S=41%
Wyjaśnienie:
