Question

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Answer 1

Answer:

Explanation:

It is known:

One mole of water = 18 gram or 18 ml=1NA(Avogadro number)

As given:

54 mL of water = 3 moles =3 NA

1stly we have to find no of neutrons in oxygen and hydrogen separately:

No of neutrons in hydrogen=0

No of neutrons in oxygen=8

Total number of neutrons in one mole of water =8NA

So,

Total number of neutrons in 3 moles of water= 8 * 3

                                                                          =24 NA

Among the following options,option (a) 23.7 NA is correct.

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Answer 2

Explanation:

a. 23.7NA

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