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Calculate the oxidaiton number of underl...

Calculate the oxidaiton number of underlined atoms of the fopllowing : `H_(4)underline(P)_(2)o_(7)`

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`H_(4)underline(P)_(2)O_(7)`
`4(1)+2x+7(-20=0`
`4+2x-14=0`
`2x-10=0`
`2x=10`
`x=5`
Oxidation number of P in `H_4P_2O_7` is `+5`.
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