The Mole Formulae And Chemical Equations Questions and Answers

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A compound W consist of 26.7%carbon, 2.2% hydrogen and the rest oxygen. It has a relative formula Mass of 90(C=12, H=1, O=16,)

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

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An organic compound J has the following percentage by mass, carbon 64.86%, hydrogen 13.51% and the rest is oxygen. The relative molecular mass of the compound is 74. C = 12, O = 16, H = 1)

asked Aug 17, 2021 in Chemistry Form 3 by anonymous

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The molar mass of a gaseous compound XO2 is 64 gmol-1. A sample of this gas occupied 11.2dm3 at s.t.p.molar gas volume =22.4dm3.find

asked Jul 27, 2021 in Chemistry Form 3 by anonymous

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200cm3 of oxygen gas take 250seconds to diffuse through a porous plug. Under similar conditions, an equal volume of an unknown gas take 277 seconds to diffuse through the same porous plug. Calculate the relative molecular mass of the unknown gas.

asked Jul 27, 2021 in Chemistry Form 3 by anonymous

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A gaseous compound consists of 86% carbon and 14% hydrogen by mass. At s.t.p, 3.2dm3 of the compound has a mass of 6g. (C = 12 H = 1 molar gas volume at s.t.p = 22.4dm3)

asked Jul 7, 2021 in Chemistry Form 3 by anony mous

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