Answer : The volume of oxygen gas at STP is, 0.56 L or 560 ml
Explanation : Given,
Mass of oxygen gas = 0.80 g
Molar mass of oxygen gas = 32 g/mole
First we have to calculate the moles of oxygen gas.
Now we have to calculate the volume of oxygen gas.
As we know that at STP,
1 mole of oxygen gas contains 22.4 L volume if oxygen gas
So, 0.025 mole of oxygen gas contains volume if oxygen gas
Conversion : 1 L = 1000 ml
Therefore, the volume of oxygen gas at STP is, 0.56 L or 560 ml