Question 9(a)
What is the mass of:
(a)0.2 mole of oxygen atoms?

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Solution

(a) Mass of one mole of oxygen atoms = 16 g
Then, mass of 0.2 mole of oxygen atoms $= 0.2 \times 16 g = 3.2 g$

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One mole of oxygen atom weighs 16 grams, what will be the mass (in grams) of 0.4 moles of oxygen atoms?

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