Question

\(1\) g of \(\text{H}_2\) contains the same number of molecules as in

• A. \(14\) g of \(\text{N}_2\)
• B. \(18\) g of \(\text{H}_2\text{O}\)
• C. \(16\) g of \(\text{CO}\)
• D. \(28\) g of \(\text{N}_2\)

Hint:

Equal moles mean equal numbers of molecules.

Answer 1

The Correct Option is A

Step 1: Count molecules
$1$ g H$_2$ has $0.5\times6.022\times10^{23}=3.011\times10^{23}$ molecules. $14$ g N$_2$ has the same count. Option (A).

Final Answer:
Option (A). \[ \boxed{\text{(A)}} \]