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Among the following nitrogen compounds, which one has lowest percentage of nitrogen?
(a)Ammonium sulphate
(b)Urea
(c)Ammonium nitrate
(d)Calcium nitrate

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Important Questions on Stoichiometry (Mole Concept)
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How many moles of are evolved when one mole of is reduced to by in an acidic medium?

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Conversion of molecular oxygen to ozone takes place only to the extent of . Calculate the mass (in ) of ozone that is formed from of oxygen at .

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of on heating produces amount of If the final weight of after the reaction is the amount of liberated in at is

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Molality of is, approximately [, Molar mass of ].

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A fuel cell generates electricity by using methanol as fuel and as the oxidant. Calculate the equivalent weight of methanol.
