Question

Which contain maximum number of molecules?

• A. 10 gm Hydrogen
• B. 10 gm Oxygen
• C. 10 gm Nitrogen
• D. 10 gm Carbon dioxide

Hint:

Hydrogen has the lowest molar mass, so it will have the most molecules for the same mass compared to other substances.

Answer 1

The Correct Option is A

To determine the quantity of molecules, we apply the following formula:\ \[\n\text{Number of moles} = \frac{\text{Mass}}{\text{Molar mass}}\n\]\ Given that hydrogen possesses the lowest molar mass (1 gm/mol), a 10 gm sample of hydrogen will contain the greatest number of molecules.