Question

ХИМИЯ. Найди W
А) Na2SO4
Б) HNO3
Помогите пожалуйста

Answer 1

Mr (Na2SO4)= 23*2+32+16*4=142
W (Na)= 46/142*100=32.39%
W (S)= 32/142*100=22.5%
W(O)=64/142*100=45%

Mr (HNO3) =1+14+16*3=63
W(H)= 1/63*100=1.58%
W(N)= 14/63*100=22.2%
W(O)=48/63*100=76.19%