Question
Calculate the number of molecules present in 2.24 dm ^3 of carbon dioxide at STP ?
MHT CET
Chemistry
Some Basic Concepts of Chemistry
2026
MHT CET 2026 (17 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 2.011 10^ 22
- B. 3.011 10^ 22
- C. 6.022 10^ 22
- D. 0.1 10^ 23
Answer
C. 6.022 10^ 22
Step-by-step solution
Volume of CO _2 at STP = 2.24 dm ^3 = 2.24 L Molar volume of an ideal gas at STP = 22.4 L Number of moles of CO _2 = 2.24 22.4 = 0.1 mol Number of molecules = Number of moles N_A Number of molecules = 0.1 6.022 10^ 23 = 6.022 10^ 22 Answer: 6.022 10^ 22
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