Question

A flask P contains 0.5 g mole of oxygen gas. Another flask Q contains 0.4 mole of ozone gas. Which of the two flasks contains greater number of oxygen atoms ?​

Answer 1

Flask A:

1 mole of oxygen gas = 6.023 x 10²³molecules

∴ 0.5 mole of oxygen gas = 6.023 x 10²³ x 0.5

The number of atoms in flask A = 6.023 x 10²³ x 0.5 x 2 = 6.023 x 10²³ atoms.

Flask B:

1 mole of ozone gas = 6.023 x 10²³ molecules

0.4 mole of ozone gas = 6.023 x 10²³x 0.4 molecules

The number of atoms in flask B = 6.023 x 1023 x 0.4 x 3 = 7.227 x 10²³ atoms.

.. Flask B contains a great number of oxygen atoms as compared to flask A.

Answer 2

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No of moles of oxygen atoms in P=0.5×2=1mole

while in Q=0.4×3=1.2mole

So Q has higher no of the mole of oxygen atoms.

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