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Calculate the number of Na^(+) ion prese...

Calculate the number of `Na^(+)` ion present in 710 mg of `Na_(2)SO_(4)` in aqueous solution
`(N_(A)=6xx10^(23))`
If your answer is `x xx 10^(y)` (in scientific notation) then fill `x` in OMR, where `x` is single digit number

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