4P+5O₂=2P₂O₅
Mr(P₂O₅)=31x2+16x5=62+80=142
ω(P)=62÷142=0,437 ω%(P)=0,436 ×100%=43,7%
ω(O)=80÷142=0,563 ω%(O)=0,563×100%=56,3%
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4P+5O₂=2P₂O₅
Mr(P₂O₅)=31x2+16x5=62+80=142
ω(P)=62÷142=0,437 ω%(P)=0,436 ×100%=43,7%
ω(O)=80÷142=0,563 ω%(O)=0,563×100%=56,3%