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A copper plate of 20 cm x 10 cm is to be...

A copper plate of 20 cm x 10 cm is to be plated with silver of 1 mm thickness on both the sides. Number of moles of silver required for plating is (density of silver =10.8 g m /cc)____________

A

`1.2xx10^(24)`

B

`2.4xx10^(24)`

C

`1.2xx10^(13)`

D

`2.4xx10^(23)`

Text Solution

Verified by Experts

The correct Answer is:
A
area = `20xx10`
volume = `20xx10xx0.1=20cm^(3)`
`d=10.8g//cm^(3)`
`implies W=20xx10.8=216g`
implies moles = `(216)/(108)=2=1.2xx10^(24)` atoms
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