At STP, the number of molecules present in 5.6 L of O2 gas is:
- A.6.022 × 10²³
- B.1.5055 × 10²³
- C.2.24 × 10²³
- D.3.011 × 10²³
Show answer
One mole of any gas occupies 22.4 litres at STP, so 5.6 litres is 5.6 divided by 22.4, that is one quarter of a mole.
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