Organic Chemistry Answers

if a mixture of lubricating oil diesel oil petrol , paraffin and kerosene are placed in a fractional distillation apparatus what could be done if the fractions collected were found to still be mixtures

Electrophilic substitution of naphthalene with isobutylene and HF

What is meant by “gluconeogenesis is a cost to the cell”

Explain the stability of axial and equatorial substitution of cyclohexane

The following chemical reaction is at equilibrium at 25°C in a 1.0 L flask, with [A] = 0.28 M.

A(g) mc028-1.jpg B(g) K = 2.47

Suppose that 0.10 moles of A is added to the system. What will be the concentration of B after equilibrium has re-established

which compound will have the larger magnitude enthalpy of hydration

I have a saturated saline solution in water at a fixed temperature A. Can I dissolve yet another salt and thus increase the density of the solution and bring the temperature back to value A without any salt precipitating.

When determining the energy of a reaction where 0.250 mol of a substance with a ΔHcomb = -2250.0 kJ/mol reacts, we perform this calculation: −2250.0 kJ 1mol = x kJ 0.250 mol OR 0.250 mol −2250.0 kJ 1mol Why can’t we simply say that the energy of the reaction is -2250.0 kJ? (1 marks) ( )

A student is determining the enthalpy of solution for ammonium nitrate by adding ammonium nitrate to a calorimeter and measuring the temperature change. The accepted value is ΔHsol’n = 25.7 kJ/mol. A student, not paying attention, adds 1.5g of ammonium nitrate instead of 1.0g. When they perform their calculations, they use 1.0g as the mass. Will their calculation result in an answer that is higher than the accepted value or lower? Explain. (2 marks)

Calculate the enthalpy of the following reaction: (3 marks) 2Mg + O2 → 2MgO Given: Mg + 2HCl → MgCl2 + H2 ΔH = -21.0 kJ MgO + 2HCl → MgCl2 + H2 O ΔH = -33.5 kJ H2 + ½ O2 → H2 O ΔH = -76.0 kJ