JEE Mains · Chemistry · STD 12 - 2. Electrochemistry
\(0.05 \mathrm{~cm}\) thick coating of silver is deposited on a plate of \(0.05 \mathrm{~m}^2\) area. The number of silver atoms deposited on plate are _______ \(\times 10^{23}\). (At mass Ag \(\left.=108, \mathrm{~d}=7.9 \mathrm{~g} \mathrm{~cm}^{-3}\right)\)
- A \(7\)
- B \(9\)
- C \(10\)
- D \(11\)
Answer & Solution
Correct Answer
(D) \(11\)
Step-by-step Solution
Detailed explanation
Volume of silver coating =\(0.05 \times 0.05 \times 10000\) \(=25 \mathrm{~cm}^3\) Mass of silver deposited=\(25 \times 7.9 \mathrm{~g}\) Moles of silver atoms =\(\frac{25 \times 7.9}{108}\) Number of silver atoms =\(\frac{25 \times 7.9}{108} \times 6.023 \times 10^{23}\)…
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