Mr(KNO3)=39+14+(16*3)=101
w(K)=39/101*100=39%
w(N) =14/101*100=14%
w(O3)=48/101*100=47%
Mr(Ca(H2PO4)2)=40+(2+31+64)*2= 234
w(Ca)=40/234*100%=17%
w(H2)=2*2/234*100%=2%
w(P)=31*2/234*100%=26%
w(O4)=64*2/234*100%=55%
Mr(Ca3(PO4)2)=120+(31+64)*2=310
w(Ca3)=120/310*100%=39%
w(P)=31*2/310*100%=20%
w(O4)=64*2/310*100%=41%
Mr(KNO3)=39+14+(16*3)=101
w(K)=39/101*100=39%
w(N) =14/101*100=14%
w(O3)=48/101*100=47%
Mr(Ca(H2PO4)2)=40+(2+31+64)*2= 234
w(Ca)=40/234*100%=17%
w(H2)=2*2/234*100%=2%
w(P)=31*2/234*100%=26%
w(O4)=64*2/234*100%=55%
Mr(Ca3(PO4)2)=120+(31+64)*2=310
w(Ca3)=120/310*100%=39%
w(P)=31*2/310*100%=20%
w(O4)=64*2/310*100%=41%