Răspuns:
Explicație:
R a=3:1:4
R m=3*23:31:4*16=69:31:64
M =69+31+64=164 g/mol
164 g......69g Na....31g P....64g O
100 ..........x...............y.............z
x=42,07 y=18,90 z= 39,02
mP=?
m Na3PO4=325 g
C=25 %
md=c*ms/100=25*325/100=81,25 g
164 g.......31 g P
81,25g.........x
x=15,35g