Question

h3po4 массу каждого элемента

Answer 1

H3PO4
M(H3PO4)=3+31+64=98
ω(H)=3Ar(H)/Mr(H3PO4)=3/98=0.03 (3%)
ω(P)=Ar(P)/Mr(H3PO4)=31/98=0.32 (32%)
ω(O)=4Ar(O)/Mr(H3PO4)=64/98=0.65 (65%)