HARDMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryGaseous stateAchiever Section
How many O₂ molecules are present in 2.0 L of oxygen gas at 27 °C temperature and 3.0 atm pressure ?
A.1.0 × 103
B.1.5 × 1023✓ Correct
C.1.5 × 1024
D.2.5 × 1024
Explanation
PV 3 2 RT 0.0821 300 n x x 2 23 No. of molecules of O is given by 3 2 6.022 10 0.0821 300 x x x x 23 1.46 10 x Gaseous State 36 23 1.5 10 x
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