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The value of n in the molecular formula ...

The value of `n` in the molecular formula `Be_(n)Al_(2) SiO_(18)` is …..

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The correct Answer is:
3
Since net charge on the neutral molecule is zero
`:.` for the given molecule `Be_(n)Al_(2)Si_(6)O_(18)`
`n(+2)+2(+3)+6(+4)+18(-2)=0`
`2n+6+24-36=0or 2n=6:. n=3` .
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