InterviewSolution
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InterviewSolution
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Lead metal has a density of `11.34 g//cm^(3)` and crystallizes in a face-centered lattice. Choose the correct alternativesA. the volume of one unit cell is `1.214 xx 10^(-22) cm^(3)`B. the volume of one unit cell is `1.214 xx 10^(-19) cm^(3)`C. the atomic radius of lead is 175 pmD. the atomic radius of lead is 155.1 pm |
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Answer» Correct Answer - A::C Density `= (Z xx M)/(N_(A) xx "volume")` ltrbgt so, Volume `= (4 xx 207)/(6.02 xx 10^(23) xx 11.34) = 1.213 xx 10^(-22) cm^(3), 4r = asqrt2` `r = (4.95 xx 10^(-8) xx sqrt2)/(4) = 175 pm` Volume `= a^(3) = 1.213 xx 10^(-22)` ltrbgt So, `a = (1.213 xx 10^(-24))^(1//3) rArr a = 4.95 xx 10^(-8) cm` |
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