Mr(Na3PO3) = 23*3 + 31 + 16*3 = 148
W(Na) = Ar(Na)*n / Mr(Na3PO3) *100% = 23*3 / 148 *100% = 47%
W(P) = Ar(P)*n / Mr(Na3PO3) *100% = 31 *1 / 148 *100% = 21%
W(O) = Ar(O) *n / Mr(Na3PO3) *100% = 16*3 / 148 *100% = 32%
Mr(Na3PO3) = 23*3 + 31 + 16*3 = 148
W(Na) = Ar(Na)*n / Mr(Na3PO3) *100% = 23*3 / 148 *100% = 47%
W(P) = Ar(P)*n / Mr(Na3PO3) *100% = 31 *1 / 148 *100% = 21%
W(O) = Ar(O) *n / Mr(Na3PO3) *100% = 16*3 / 148 *100% = 32%