Qa. What is the mass of: can 0.2 mole of oxygen atoms?
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Answer:
Therefore, the mass of 0.2 moles of oxygen atom is 3.2 grams and the mass of 0.5 moles of a water molecule is 9.0 grams.
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Explanation:
To calculate the mass of 0.2 moles of oxygen atom we should know the mass of a single atom of oxygen that is 16.
-So, as we know that one mole of oxygen has a mass of 16 gram then the mass of 0.2 moles will be:
0.2 ⋅ 16 = 3.2 gram
-Similarly, to calculate the mass of 0.5 moles of a water molecule, we have to find the molecular mass of 1 mol of water that is:
Mass = 2 +16 = 18
-So, as the mass of 1 mol of water is 18 then the mass of 0.5 moles of water will be:
18 ⋅ 0.5 = 9.0 gram
-Therefore, the mass of 0.2 moles of oxygen atom is 3.2 grams and the mass of 0.5 moles of a water molecule is 9.0 grams.
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