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Question

The ratio of oxygen atoms in 12.25 g of potassium chlorate and 1.06 g of sodium carbonate is _______.

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Solution

potassium chlorate atomic weight = 122.55 gm
number of mole potassium chlorate in 12.25gm = 12.25122.55= 0.01 mole
number of oxygen atoms in that amount of KClO3 is = 3×0.01moles×6.02×1023atoms / mole = 1.806×1022 atoms
sodium carbonate atomic weight = 106 gm
number of mole sodium carbonate in 1.06 gm = 1.06/106=0.01mole
number of oxygen atoms in that amount of Na2CO3is = 3×0.01moles×(6.02×1023 atoms / mole) = 1.806×1022 atoms

answer = number of oxygen atoms in KClO3number of oxygen atoms in Na2CO3

answer = 1

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