JEE Main 2023 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2023 (Online) 10th April Morning Shift
Question
The number of molecules and moles in 2.8375 litres of O at STP are respectively
Choose an option
Show full solutionCorrect option: D
Step-by-step explanation
At STP, one mole of any gas occupies 22.4 liters. Therefore, 2.8375 liters of oxygen gas at STP is equal to 0.125 moles. The number of molecules of oxygen gas in 0.125 moles is calculated by multiplying the number of moles by Avogadro's number, which is molecules/mol. This gives us a total of molecules of oxygen gas in 2.8375 liters at STP.
Here is the calculation:
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This is a previous-year question from JEE Main 2023, covering the Some Basic Concepts Of Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.