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Stoichiometry

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

Molality
Normality
Molarity
Mole fraction

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Stoichiometry
Solutions which distil without change in composition are called

Saturated
Supersaturated
Azeotropic
Ideal

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Stoichiometry
The vapor pressure of water at 100°C is

100N/m²
760 mm wc
13.6 cms of Hg
76 cms of Hg

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Stoichiometry
The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately

0.13
0.07
0.11
0.09

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Stoichiometry
The combustion equations of carbon and carbon monoxide are as follows: C + O₂ = CO₂, ΔH = - 394 kJ/kg . mole CO + 1/2 O₂ = CO₂, ΔH = - 284.5 kJ/kg. mole. The heat of formation of CO is __________ kJ/kg. mole.

+100
-109.5
+109.5
+180

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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
0.5 < XM < 0.64
XM ≥ 0.64
XM = 0.5

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