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Stoichiometry

Stoichiometry
Isotopes are atoms having the same

None of these
Atomic mass
Mass number
Number of neutrons

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Stoichiometry
For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is

1
3
2

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

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

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Stoichiometry
One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as

Brix = (400/G) - 400
None of these
Brix = 145 - (145/G)
Brix = 200 (G-1)

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

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Stoichiometry
Pick out the wrong unit conversion of calorific value.

1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg
1 BTU/ft³ = 8.9 kcal/m³ = 0.038 MJ/m³
1 BTU/lb = 2.3 kcal/kg
1 kcal/m³ = 0.1124 BTU/ft³

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