Question

Find (a), the total number and (b) the rotal mass of protons in 34 mg of NH3 at STP.
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Answer 1

here is the correct answer

Answer 2

Answer:(In Explanation)

Explanation:

(a)Number of protons present in 1 molecule of ammonia =7+3=10.

Number of molecules present in 34 mg of ammonia is  

17

6.023×10  

23

×34×10  

−3

 

​  

=1.2044×10  

21

.

Total number of protons present in 34mg of ammonia=10×1.2044×10  

21

=1.2044×10  

22

.

(b) Total mass of protons present in 34 mg of ammonia at STP is:

1.6726×10  

−27

×1.204×10  

22

=2.0138×10  

−5

 kg.