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Stoichiometry

Stoichiometry
How much O₂ can be obtained from 90 kg of water?

90 kg
64 kg
32 kg
80 kg

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Stoichiometry
The heat of vaporisation __________ with increase in pressure.

Increases
Becomes zero at critical pressure
Decreases
Both B and C

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Stoichiometry
The number of H⁺ in 1 c.c solution of pH 13 is

10¹³
6.023 xl0¹³
6.023 x 10¹⁰
6.023xl0⁷

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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
0.2
0.8
0.6

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Stoichiometry
1 ata is equivalent to

10 torr
0.98 Pascal
1 atm
1 kgf/cm²

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Stoichiometry
The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies

XM < 0.5
XM = 0.5
0.5 < XM < 0.64
XM ≥ 0.64

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