Answer:
To find the mass of O2 produced, we need to convert moles of O2 to grams. We know that the molar mass of O2 (one molecule of oxygen, O2) is approximately 32 g/mol (16 g/mol for each oxygen atom, and there are two in a molecule of O2).
So, if we have 5.3 moles of O2, the mass in grams would be:
5.3 moles * 32 g/mol = 169.6 grams
So, the answer is closer to 170 grams.
I hope this helps, I think?