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Stoichiometry

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

6.023 xl0¹³
6.023 x 10¹⁰
6.023xl0⁷
10¹³

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Stoichiometry
Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0-5m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are

Kmole/m².s.Pa
Cm/s
M/s
Mole/m².s.Pa

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Stoichiometry
The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?

0.2
0.6
0.1
0.4

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Stoichiometry
In a chemical process, the recycle stream is purged for

Heat conservation
Enriching the product
Limiting the inerts
Increasing the product yield

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Stoichiometry
Roult's law is obeyed by a __________ solution.

Molar
None of these
Saturated
Normal

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Stoichiometry
A sugar solution containing __________ percent sugar is equivalent to 1 Brix.

1
0.1
0.01
10

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