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Use the following information to answer the questions that follow:
answered
Aug 17, 2021
in
Chemistry Form 3
the mole: formulae and chemical equations
organic chemistry
0
votes
State Hess’s law.
answered
Aug 17, 2021
in
Chemistry Form 4
energy changes in chemical and physical processes
0
votes
During electrolysis of aqueous copper (II) sulphate using copper electrodes a current of 0.2 amperes was passed through the cell for 5 hours. Determine the change in mass of the cathode that occurred as a result of the electrolysis process. (Cu = 64, IF = 96500 coulombs).
answered
Aug 17, 2021
in
Chemistry Form 4
electrochemistry
0
votes
Aqueous copper (II) sulphate was electrolysed using the set up below.
answered
Aug 17, 2021
in
Chemistry Form 4
electrochemistry
0
votes
Use the standard electrode potentials for elements A, B, C, D and F given below to answer the questions that follow.
answered
Aug 17, 2021
in
Chemistry Form 4
reaction rates and reversible reactions
0
votes
When bromine is dissolved in water the equilibrium shown below is established.
answered
Aug 17, 2021
in
Chemistry Form 4
reaction rates and reversible reactions
0
votes
An organic compound J has the following percentage by mass, carbon 64.86%, hydrogen 13.51% and the rest is oxygen. The relative molecular mass of the compound is 74. C = 12, O = 16, H = 1)
answered
Aug 17, 2021
in
Chemistry Form 3
the mole-formulae and chemical equations
0
votes
Cracking can also be achieved using less amount of heat in the presence of a catalyst. Name one catalyst that is often used.
answered
Aug 17, 2021
in
Chemistry Form 3
organic chemistry
0
votes
One mole of heptane was thermally cracked, two hydrocarbons Q and P were formed. Q was an alkene molecule with three carbon atoms.
answered
Aug 17, 2021
in
Chemistry Form 1
0
votes
Sodium metal reacts with air to form two oxides. Give the formulae of the oxides.
answered
Aug 17, 2021
in
Chemistry Form 3
metals
0
votes
Explain why aqueous sodium chloride is not suitable as an electrolyte for the manufacture of sodium in the Downs process.
answered
Aug 17, 2021
in
Chemistry Form 4
electrochemistry
0
votes
Below is a simplified diagram of the Down’s cell used for the manufacture of sodium. Study it and answer the questions that follow.
answered
Aug 17, 2021
in
Chemistry Form 4
electrochemistry
0
votes
Study the information below and answer the questions that follow. The letters do not represent the actual symbols of the elements.
answered
Aug 17, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
chemical families patterns in properties
0
votes
Study the table below and answer the questions that follow.
answered
Aug 17, 2021
in
Chemistry Form 1
structure of the atom and the periodic table
0
votes
State one use of C2H4.
answered
Aug 17, 2021
in
Chemistry Form 3
organic chemistry
0
votes
A student in form three was given two gases C2H6 and C2H4. He added acidified Potassium Manganate (VII) to each solution. State the observations the student made.
answered
Aug 17, 2021
in
Chemistry Form 3
organic chemistry
0
votes
State the function of each of the following in the solvay process of production of Sodium Carbonate.
answered
Aug 17, 2021
in
Chemistry Form 2
carbon and its compounds
0
votes
Electrode potentials for the half cells are shown below. Use the information to answer the questions that follow.
answered
Aug 17, 2021
in
Chemistry Form 4
electrochemistry
0
votes
The diagram below is used to prepare nitrogen (IV) oxide gas.
answered
Aug 17, 2021
in
Chemistry Form 3
nitrogen and its compounds
0
votes
Given that the hydration energies of Ca2+(g) and Cl-(g) are -1562KJ/Mole and -364KJ/Mole respectively. The heat of solution (Hsoln) for one Mole of CaCl2 is -82.9 KJ/Mole. Determine the lattice energy for CaCl2.
answered
Aug 17, 2021
in
Chemistry Form 3
the mole: formulae and chemical equations
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