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The number of moles of CuO, that will be...

The number of moles of CuO, that will be utilized in Dumas method for estimating nitrogen in a sample of `57.5`g of N,N-dimethylaminopentane is ____________`xx10^(-2)`. (Nearest integer)

Text Solution

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The correct Answer is:
1125
The chemical formula of N, N -dimethylaminopentane is `C_7H_17N` (Molar mass = 115)
Number of moles of `C_7H_17N` taken `= 57.5 /115 =0.5`
`C_7H_17N + (14 + 17/2) CuO`
`to 7CO_2 + 17/2 H_2O + 1/2 N_2 + (14 + 17/2) Cu`
For 0.5 moles of `C_7H_17N`, number of moles of CuO required ` = 1/2 (14 + 17/2) = 45/4 = 1125 xx 10^(-2)`.
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