MHT CET202617 April 2026Morning ShiftChemistrySome Basic Concepts of ChemistryActual

Calculate the number of molecules present in 2.24 dm ^3 of carbon dioxide at STP ?

Options

A2.011 10²²
B3.011 10²²
C6.022 10²²
D0.1 10²³

Correct answer

C. 6.022 10²²

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 10²³ = 6.022 10²² Answer: 6.022 10²²

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