<u>Answer:</u> The volume of given amount
at STP is 1.12 L
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of oxygen = 1.6 g
Molar mass of oxygen = 32 g/mol
Putting values in above equation, we get:

At STP:
1 mole of a gas occupies 22.4 liters of volume.
So, 0.05 moles of oxygen gas will occupy =
of volume.
Thus, the volume of given amount
at STP is 1.12 L