Chemistry - Mole Concept Question with Solution | TestHub

ChemistryMole ConceptMiscellaneous/MixedMedium2 minPYQ_2024

ChemistryMediumassertion reason

$0.05 cm$ thick coating of silver is deposited on a plate of $0.05 m^{2}$ area. The number of silver atoms deposited on plate are _______ $\times 10^{23}$ . (At mass Ag $= 108, d = 7.9 g {cm}^{- 3})$ Round off to the nearest integer.

Answer:

Solution:

Volume of silver coating $= 0.05 \times 0.05 \times 10000 = 25 {cm}^{3}$

Given, Density = $7.9 g {cm}^{- 3}$

Density = Mass/ Volume

Mass of silver deposited $= 25 \times 7.9 g$

Moles of silver atoms = mass / molar mass $= \frac{25 \times 7.9}{108}$

Number of silver atoms $= \frac{25 \times 7.9}{108} \times 6.023 \times 10^{23}$

$= 11.01 \times 10^{23}$

Ans. $11$

Stream:JEESubject:ChemistryTopic:Mole ConceptSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2024

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