P2O5
W(P) = 43,7%
W(O) = 56,3%
H3PO4
W(H) = 3%
W(P) = 31,6%
W(O) = 65,4
Объяснение:
Mr(P2O5) = 31*2+15*5 = 142
W(P) = 31*2/142*100% = 43,7%
W(O) = 100%-43,7% = 56,3%
Mr(H3PO4) = 1*3+31+16*4 = 98
W(H) = 1*3/98*100% = 3%
W(P) = 31/98*100% = 31,6%
W(O) = 100%-(3%+31,6%) = 65,4
