JEE Main 2022 · 28 Jul · Shift 2 · Chemistry Q52

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ChemistryInteger+4 / -1Question 52 of 90

Metal M crystallizes into a fcc lattice with the edge length of $4.0\times10^{-8}$ cm. The atomic mass of the metal is ______ g/mol. (Nearest integer)

(Use : $N_A=6.02\times10^{23}$ mol $^{-1}$ , density of metal, M = 9.03 g cm $^{-3}$ )

Your answer

Answer and worked solution

Official answer: 87

fcc ( $Z=4$ ). $M=\frac{\rho a^3N_A}4=\frac{9.03\times64\times10^{-24}\times6.02\times10^{23}}4\approx87$ .

Answer: 87

Topics:Density of crystals

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JEE Main 2022 · 28 Jul · Shift 2, Chemistry question 52