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CBSE Class 11-science Answered

<div>Calculate the total no. of atoms in 2 litre gaseous mixture of CH4 and SO2 at STP which have vapour density 26</div>
Asked by Anil | 24 May, 2017, 03:01: PM
Expert Answer
Molecular space weight space of space the space gas space equals space straight V. straight D space cross times space 2 space equals space 26 space cross times 2 space equals space 52 space straight g straight n space equals space PV over RT space equals space fraction numerator 1 space cross times space 2 over denominator 0.0821 space cross times space 272 end fraction space equals space 0.089 space mol Now comma Mass space of space mixture space equals space No. space of space moles space cross times space Molecular space weight space equals space 0.089 space cross times space 52 space equals space 4.63 space straight g Gram space atomic space weight space of space mixture space equals space Molecular space mass space of space CH subscript 4 space plus space Molecular space mass space of space SO subscript 2 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 16 space plus space 64 space equals space 80 space straight g Total space no. space of space atoms space equals space fraction numerator 4.63 over denominator 80 end fraction space cross times space 6.022 space cross times space 10 to the power of 22 space equals space bold 3 bold. bold 49 bold space bold cross times bold space bold 10 to the power of bold 22 bold space bold atoms
Answered by Arvind Diwale | 24 May, 2017, 04:32: PM

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