JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
Which of the following contain the same number of atoms ? (Given : Molar mass in g mol\(^{-1}\) of H, He, O and S are \(1, 4, 16\) and \(32\) respectively)
A. \(2\) g of O\(_2\) gas
B. \(4\) g of SO\(_2\) gas
C. \(1400\) mL of O\(_2\) at STP
D. \(0.05\) L of He at STP
E. \(0.0625\) mol of H\(_2\) gas
Choose the correct answer from the options given below :
- A A and B only
- B B and C only
- C C and D only
- D A, C and E only
Answer & Solution
Correct Answer
(D) A, C and E only
Step-by-step Solution
Detailed explanation
Number of atoms is calculated as the product of the number of moles, atomicity, and Avogadro's number (\(N_A\)). For A: Moles of O\(_2\) = \(\dfrac{2}{32} = \dfrac{1}{16}\) mol. Atomicity of O\(_2\) is \(2\). Number of atoms =…
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