There are as many notes as number of oxy...

There are as many notes as number of oxygen atoms in 24.8 gm `Na_(2)S_(2)O_(3).5H_(2)O` (Mw = 248). A note counting machine counts 48 milion notes per day. Number of days taken to count these notes is

A

`10^(17)`

B

`10^(16)`

C

`10^(10)`

D

`10^(12)`

Verified by Experts

The correct Answer is:

B

No.of O-atoms = `(24.8)/(248)xxN_(0)xx8`
`48xx10^(6)rarr1" day"`
`0.8xx6xx10^(23)rarr?=10^(16)`

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