Some Basic Concepts Of Chemistry Question 305

Question: Which one of the following pairs of gases contains the same number of molecules [EAMCET 1987]

Options:

A) 16 g of $ O _2 $ and 14 g of $ N _2 $

B) 8 g of $ O _2 $ and 22 g of $ CO _2 $

C) 28 g of $ N _2 $ and 22 g of $ CO _2 $

D) 32 g of $ O _2 $ and 32 g of $ N _2 $

Show Answer

Answer:

Correct Answer: A

Solution:

16g $ O _2 $ has no. of moles $ =\frac{16}{32}=\frac{1}{2} $

14g $ N _2 $ has no. of moles $ =\frac{14}{28}=\frac{1}{2} $

No. of moles are same, so no. of molecules are same.



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