Verified Solution • 2025–26 Session moderate

QJEEM21Chbdf3: JEE Main 2021 Chemistry - Class 12 JEEM21Chbdf3 Solution: A copper complex crystallising in a CCP lattice with a cell…

A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction studies. The density of a copper complex is found to be 7.62 g cm −- 3. The molar mass of copper complex is ____________ g mol −- 1. (Nearest integer)

[Given : NA = 6.022 ×\times 1023 mol −- 1]

Step-by-Step Verified Solution

d(gmcc)=4×MNA(a cm)3d\left( {{{gm} \over {cc}}} \right) = {{4 \times {M \over {{N_A}}}} \over {{{(a\,cm)}^3}}}

7.62=4×M/6.022×1023(0.4518×10−7cm)37.62 = {{4 \times M/6.022 \times {{10}^{23}}} \over {{{(0.4518 \times {{10}^{ - 7}}cm)}^3}}}

⇒\Rightarrow M = 105.8 g/mol

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