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STANDARDChemistry-States of Matter

STANDARD Chemistry Mole Concept MCQ Question

Type: MCQ-numerical-Medium

How many number of molecules and atoms respectively are present in 2.8 litres of a diatomic gas at STP?

A

6.023 × 10²³, 7.5 × 10²³

B

6.023 × 10²³, 15 × 10²²

C

7.5 × 10²², 15 × 10²²

D

15 × 10²², 7.5 × 10²³

Correct Answer

Option C

Detailed Explanation

Number of molecules of gas at STP = (6.023 × 10²³ × 2.8) / 22.4 = 7.5 × 10²² molecules. Number of atoms in diatomic molecule = 2 × 7.5 × 10²² = 15 × 10²² atoms.

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