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CO=16+12=28
H3PO4=3+64+31=98
C4H10=12*4+10=48+10=58
N2=14*2=28
C2H4=4+12=16
KF=39+19=58
1=3
2=5
4=7
CO=16+12=28
H₃PO₄=3+64+31=98
C₄H₁₀=12×4+10=48+10=58
N₂=14*2=28
C₂H₄=4+12=16
KF=39+19=58
H₂SO₄=H₃PO₄
CO=N₂
C₄H₁₀=KF