AP EAMCET · Chemistry · Solid State
How many unit cells are present in a cube shaped ideal crystal of \(\mathrm{NaCl}\) of mass lg?
- A \(5.14 \times 10^{21}\)
- B \(1.28 \times 10^{24}\)
- C \(1.71 \times 10^{21}\)
- D \(2.5 \times 10^{21}\)
Answer & Solution
Correct Answer
(D) \(2.5 \times 10^{21}\)
Step-by-step Solution
Detailed explanation
Molar mass of \(\mathrm{NaCl}=58.5\) lg of \(\mathrm{NaCl}=\frac{1}{58.5}\) mole of \(\mathrm{NaCl}\) \(1 \mathrm{~g}\) of \(\mathrm{NaCl}=\frac{1}{58.5} \times 6.022 \times 10^{23}\) molecules of \(\mathrm{NaCl}\) 4 molecules of \(\mathrm{NaCl}\) are present as…
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