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Deliquescence, the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution. Deliquescence occurs when the vapour pressure of the solution that is formed is less than the partial pressure of water vapour in the air. A particular example of hygroscopic behavior is deliquescence which is exhibited by many water-soluble solids, including inorganic salts (e.g., calcium chloride).

Helium floats because it is buoyant; its molecules are lighter than the nitrogen and oxygen molecules of our atmosphere and so they rise above it

32g of CUSO\(_4\) liberate 13.0kj of heat Molar mass of CUSO\(_4\) = 160g No. of moles of CUSO\(_4\) = 32g No. of moles = 32(mass) / 160(molar mass) = 0.2 moles i.e 0.2 = 13kj 1 moles = xkj : 65KJ

M Cl % composition 20.22 79.78 Atomic mass 27 35.5 Mole ratio 20.22 79.78 27 35.5 0.75 2.25 Divided 0.75 0.75 1 3 The formula of the Chloride = MCl\(_3\)

4OH ⇒ 2H\(_2\)O + O\(_2\) + 4e- From the equation: 1 mole of Oxygen requires 4e i.e 1 mole of Oxygen requires 4F, where 1F = 96,500 C [ 4 X 96,500 X 0.125 ] \div 1 = 48,250 C

metallic bond does not involve the formation of a new substance. It is responsible for several characteristic properties of metals such as their shiny lustre, their malleability, and their conductivities for heat and electricity

alkanone & alkanal react with HCN to form compounds known as cyanohyderins. They also react with hydroxylamine to form oximes.

One of the several uses of sulfur is for the vulcanization of rubber.

Tetrachloromethane ( carbon tetrachloride) is an effective solvent within the chemical industry and is used to clean machinery and electrical equipment. I.e as a solvent for oils, fats, lacquers, varnishes, rubber waxes, and resins, and as a grain fumigant.

2H\(_2\) + O\(_2\) ⇒ 2H\(_2\)O From the equation: 4g of Hydrogen produces 36g of water : 8g of Hydrogen will produce 72g of water

Acid hydrolysis refers to a hydrolysis reaction occurring under acidic conditions. Acid hydrolysis of a protein breaks the polymer down into its constituent amino acids.

Alkanals or Aldehydes have the general formula RCHO while Alkanones or Ketones have the general formula RCOR'. Where R and R' may be alkyl or aryl groups.

When these cathode rays are deflected onto an electrode of an electrometer, the instrument measured a negative charge. The rays tested also were deflected by application of an electric field.

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.

A halide ion is a halogen atom bearing a negative charge (which is an anion with a charge of -1). The halide anions are fluoride (F−), chloride (Cl−), bromide (Br−), iodide (I−) and astatide (At−).