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 find the number of molecules, we need to use the number of moles formula: \[ \text{Number of moles} = \frac{\text{Mass}}{\text{Molar mass}} \] Hydrogen has the smallest molar mass (1 gm/mol), so 10 gm of hydrogen contains the highest number of molecules.