What is the mass of :
a) 0.2 mole of oxygen atoms b) 10 mol of Na2SO3
c) 1.5 mol of Na+
ions. d) 4 mol of Aluminum atoms (atomic mass of Al = 27)
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Answer:
a) 3.2 grams, b)1260 g, c) 34.5 g d) 108 g
Explanation:
a) 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. -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.
b) Mass of 10 moles of sodium sulphite is 1260 grams.
c) mass of 1 mole of NA+ ion is 23 g
mass of 1.5 mole of NA+ ion is 23*1.5 = 34.5g
d)Mass of 4 moles of aluminium atoms = (27 x 4) = 108 g.
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