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Stoichiometry

Stoichiometry
1 torr is equal to __________ mm Hg column.

1
0.1
1000
10

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Stoichiometry
The vapor pressures of benzene and toluene are 3 and 4/3 atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vapourised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is

0.4
0.6
0.8
0.2

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Stoichiometry
pH value of H₂SO₄ (5% concentration) is

5
7
< 7
> 7

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Stoichiometry
80 kg of Na₂SO₄ (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na₂SO₄ .10H₂O crystals separate out. The weight fraction of Na₂SO₄ in the remaining solution is

0.24
0.18
1

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Stoichiometry
If 1.5 moles of oxygen combines with aluminium to form Al2O₃, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.

5.4
2.7
54
27

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Stoichiometry
Increasing the temperature of an aqueous solution will cause decrease in its

Mole fraction
Molarity
Weight percent
Molality

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