Question

The number of molecules in 4.25 g of NH, is
approximately
(1) 4 x 1023
(2) 1.5 x 1023
(3) 1 x 1023
(4) 6 x 1023​

Answer 1

Explanation:

Molar Mass of NH = 23 + 1

= 24

N = m÷M

N = 4.25÷24

N = 0.17 mol

No. of molecules = No of moles x Av

No. of molecules = 0.17 x 6.023 x 10²³

No. of molecules = 1.023 x 10²³

So, the apporximate molcules is 1

So, option c is the correct one.

1 x 10²³ is the correct ans.

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