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What mass of potassium chlorate (KCIO(3)...

What mass of potassium chlorate `(KCIO_(3))` on heating gives 1.491 g of potassium chloride (KCl) and 0.672 litres of oxygen at NTP?

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The correct Answer is:
Mass of `KCIO_(3)=2.451g`
Mass of 22.4 litre of oxygen at NTP=32g
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