How many moles of oxygen are present in 0.45kg of Fe2 O3
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0.45 x 1000 = 450 grams
Molar mass of Fe₂O₃ = 160 g/mol
One mole of Fe₂O₃ has 3 moles of oxygen atoms
Now, number of moles of Fe₂O₃ in 450 g = 2.8125 moles
no. of moles of oxygen in 2.8125 moles of Fe₂O₃ = 2.8125 x 3 = 8.4375 moles of oxygen are present
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