Solve this: calculate the mass of potassium chlorate
required to liberate 6.72 dm3 of oxygen at STP,
molar mass of potassium chlorate is 122.5 g/mol.
(Ans 2.45g)
3. Calculate the volume of oxygen required for
complete combustion of 0.25 mole of methane at
STP (Ans. 11.2 dm3)
4. Calculate the volume of hydrogen required for
complete hydrogenation of 0.25dm3 of ethyne at
STP. (Ans. 0.5 dm3)
5. Calculate number of moles and molecules of
6 dm3 of its volume (Ans.
X 10
8) Pho
cal
o.
ele
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