Question

The number of moles of oxygen in one litre of
air containing 21% oxygen by volume, in stan-
dard conditions, is :
a) 0.186 mole
b) 0.21 mole
c) 2.10 mole
d) 0.0093 mole

Answer 1

Answer:

B) 0.21 mole

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Answer 2

Answer:

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