
Interpretation:
The use of mass in counting the number of small objects needs to be explained.
Concept introduction:
Mass is the amount of matter present in a substance. It is proportional to the quantity of the substance which is not changed by any external parameters like temperature, pressure, etc.

Answer to Problem 1TAI
Mass is one useful unit to count larger number of small objects for example atoms of any element. Counting atoms one by one is not possible, but this problem can be addressed by using mass.
Explanation of Solution
If
Similarly, if the number of N atoms in 63 g HNO3 needs to be determined,then counting the N atoms is not possible. Only one simple calculation can help to find out the number of N atoms in 63 g HNO3. Molar mass of nitric acid is 63 g/mol. So there will be
In the same way, if one requires
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