Question

A copper plate of 20cm×10cm is to be plated with silver of 1mm thickness on both sides. No. of moles of silver required for plating is ??...(density of silver=10.8gm/cc)...., pls solve it fast....

Answer 1

A copper plate of 20cm × 10cm is to be played with silver of 1mm thickness on both sides,

so, total volume of silver required for plating on copper = 2 × (20 cm × 10cm × 1mm)
= 2 × (200 × 0.1 )cm³
= 40 cm³ or 40cc

given density of silver = 10.8 g/cc
so, mass of silver required for plating = density of silver × volume of silver
= 10.8 × 40 g

now , number of moles of silver =given weight/molecular weight
= (10.8 × 40)/108
= 4

hence, number of moles of silver required for plating is 4

Answer 2

Answer:

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