Question

caculate the mass 0.3 mole of oxygen​

Answer 1

Answer:

4.8g

Explanation:

Mass of one mole of oxygen atoms = 16 g

Then, mass of 0.3 mole of oxygen atoms = 0.3 x 16 = 4.8g

Answer 2

One molecule of oxalic acid dihydrate contains six oxygen atoms.
Thus, one mole of oxalic acid dihydrate will contain six gram atoms of oxygen atoms.
Hence, the number of gram atoms of oxygen present in 0.3 moles of oxalic acid dihydrate is 0.3×6=1.8 .