Question

Calculate the number of moles in 4.5 gram of NH3​

Answer 1

Answer:

No of moles =

gMwt

Weight

=

17

4.25

= 0.25

No of Moles ×N

A

= Number of Molecules

Number of molecules = 0.25×6.023×10

23

= 1.5×10

23

Explanation:

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Answer 2

Answer : 6.262 × 10^23

Explaination :

No. of atoms = 4.5 g

Molar mass = 14 + 3 = 17

No. of moles = $\frac{4.5}{17}$

= 0.23 moles

1 mole = 4 × 6.022 × 10^27

0.26 mole = 0.26 × 4 × 6.022 × 10^23

= 6.262 × 10^23