How many moles of potassium chlorate need to be heated to produce 11.2 litre oxygen at N.T.P.: (...

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How many moles of potassium chlorate need to be heated to produce 11.2 litre oxygen at N.T.P.:
(a) \( \frac{1}{2} \mathrm{~mol} \)
(b) \( \frac{1}{3} \mathrm{~mol} \)
(c) \( \frac{1}{4} \mathrm{~mol} \)
(d) \( \frac{2}{3} \mathrm{~mol} \)
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