Stoichiometry MCQs

1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is

The total number of atoms in 8.5 gm of NH₃ is __________ × 10²³.

6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H₂ produced will be __________ gm.

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 0.74 × 10^-5 m²/s. The numerical value of mass transfer co-efficient is 7.4 × 10^-3. Its units are

One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°₂₉₈ = -730 kJ/mole of methane. If the average specific heat of all the gases/vapour is 40 J/mole.K, the maximum temperature rise of the exhaust gases in °C would be approximately equal to

__________ chart is a graph related to Antonie equation.

Avogadro number is the number of molecules in one __________ of a gas.

The effect of pressure on the heat capacity of the gases __________ is negligible.

Dry air is a mixture of