The weight of 1 xx 10^22 molecules of Cu...

The weight of `1 xx 10^22` molecules of `CuSO_4. 5H_2O` is:

A

`4.14 g`

B

`5.14 g`

C

`6.14 g`

D

`7.14 g`

Text Solution

Verified by Experts

The correct Answer is:

A

Weight of `6.023 xx 10^(23)` (Avogadro's number )=
`Mw "of" CusO_(4).5H_(2)O = 249 g`
`= 1 "mol of" CuSO_(4).5H_(2)O`
Weight of `1 xx 10^(22)` molecules of `CuSO_(4).5H_(2)O`
`= (249 xx 10^(22))/(6.023 xx 10^(23)) = 4.14 g`

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