$($a$)$ What equal positive charges would have to be placed on two celestial objects with masses $9\mathrm{.}09{10}^{25}$ and $5\mathrm{.}87{10}^{23}kg$ to neutralize their gravitational attraction? $($b$)$ What mass of hydrogen would be needed to provide the positive charge calculated in $($a$)?$

$($a$)$ Number

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$($b$)$ Number

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