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What mass of N(2)H(4) can be oxidised to...

What mass of `N_(2)H_(4)` can be oxidised to `N_(2)` by `24.0 g K_(2)CrO_(4)`, which is reduced to `Cr(OH)_(4)^(-)`?

A

9.97 g

B

2.97 g

C

3.97 g

D

4.97 g

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The correct Answer is:
B
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