How many moles are there in 16 g of oxygen?
2 moles
3 moles
1 mole
4 moles

0.5 mole

Explanation:

16 g i equal to 0.5 mole of oxygen molecule

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm