Stoichiometry

The atomic heat capacities of all solid elements ______________ with decrease in temperature?

Byadmin March 4, 2019August 24, 2021

The atomic heat capacities of all solid elements ______________ with decrease in temperature?

A. Increases
B. Decreases
C. Remains unchanged
D. Approach zero at 0°C

Stoichiometry

The vapor pressure of water at 100°C is__________________?

The vapor pressure of water at 100°C is__________________?

A. 100 N/m2
B. 76 cms of Hg
C. 13.6 cms of Hg
D. 760 mm wc

Read More The vapor pressure of water at 100°C is__________________?
Stoichiometry

The number of H+ in 1 c.c solution of pH 13 is__________________?

The number of H+ in 1 c.c solution of pH 13 is__________________?

A. 6.023 × 1013
B. 6.023 × 1010
C. 6.023 × 107
D. 1013

Read More The number of H+ in 1 c.c solution of pH 13 is__________________?
Stoichiometry

At standard conditions, N2 + 2O2 ⇌ 2NO2; ΔG° = 100 kJ/mole NO + ½O2 ⇌ 2NO2; ΔG° = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is___________________?

At standard conditions, N2 + 2O2 ⇌ 2NO2; ΔG° = 100 kJ/mole NO + ½O2 ⇌ 2NO2; ΔG° = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is___________________?

A. 15
B. 30
C. 85
D. 170

Read More At standard conditions, N2 + 2O2 ⇌ 2NO2; ΔG° = 100 kJ/mole NO + ½O2 ⇌ 2NO2; ΔG° = -35 kJ/mole The standard free energy of formation of NO in kJ/mole is___________________?
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?

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?

A. 27
B. 54
C. 5.4
D. 2.7

Read More 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?
Stoichiometry

A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is__________________?

A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is__________________?

A. 13728 J
B. 19206 J
C. 4576 J
D. 12712 J

Read More A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is__________________?
Stoichiometry

Solutions which distil without change in composition are called________________?

Solutions which distil without change in composition are called________________?

A. Ideal
B. Saturated
C. Supersaturated
D. Azeotropic

Read More Solutions which distil without change in composition are called________________?

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