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Stoichiometry

Stoichiometry
The total number of atoms in 8.5 gm of NH₃ is __________ x 1023.

9.03
6.02
3.01
1.204

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Stoichiometry
__________ fuels require the maximum percentage of 'excess air' for complete combustion.

Liquid
Gaseous
Solid
Nuclear

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Stoichiometry
One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°298 = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about

0.67
0.33
0.40
0.19

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Stoichiometry
The most convenient way of expressing solution concentration is in terms of

Mole fraction
Normality
Molality
Molarity

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Stoichiometry
Which of the following is not a unit of length?

Parsec
Fermi
Angstrom
Barn

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Stoichiometry
Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity?Vapour pressure of water at 20°C is 17.5 mm Hg.

79.62
80
80.38
78.51

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