Question

Find the number of moles of oxygen in 11.2 litres of oxygen

Answer 1

Answer:

Any gas at STP (old conventions) has 22.4 litre molar volume so 11.2 litre means half mole

Answer 2

Answer:

Find the number of molecules in 11.2 liter of O2 at STP

So 1 mole of molecules = 6.022×1023 molecules.

Thus molecules O2 = moles O2×6.022×1023 molecules/mol.

= 0.5mol×6.022×1023 molecules/mol.

= 3.01×1023 molecules.

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