The chemical composition depends on the source. The chemical composition also usually consists of about 10 different hydrocarbons each containing 10 to 16 carbon atoms per molecule. Kerosene is the petroleum distillate and also includes the fractions with boiling points between the 150-degree Celsius and 300-degree celsius. The formula of kerosene is C12H26−C15H32.
A chemical formula is any of the several kinds of expressions of the composition or the structure of chemical compounds. The forms that commonly encountered are either empirical, molecular, structural as well as projection formulas.
An empirical formula always consists of symbols representing the elements in a compound like the Na for Sodium and the Cl for Chlorine and subscripts indicating the relative number of the atoms of each constituent element. A subscript is never used until the number is more than one.
Therefore benzene is represented by the empirical formula CH, which also indicates that the typical sample of the compound contains one atom of carbon to one atom of hydrogen. Carbon is represented as C and hydrogen is represented as H.
Water is therefore represented by the empirical formula H2O, denoting the substance containing two atoms of hydrogen for every oxygen.
A general formula type is the type of empirical formula that represents the composition of any member of the entire class of the compounds. Each and every member of the class of the paraffin hydrocarbons is an example composed of hydrogen as well as carbon. The number of hydrogen atoms always being two or more than twice the number of carbon atoms. That n stands for any number and the general formula of this class is hence CnH2n + 2 .
1. What is the Empirical Formula? What is a Structural Formula?
Ans: Empirical formulas are generally used to represent the substance with undetermined molecular structures or substances not made up of normal molecular entities. For example, sodium chloride is table salt which is also composed of ions. To express the chemical composition of an individual molecule of a particular substance then the molecule being the smallest particle in which the substance retains its chemical properties, a molecular formula has been employed.
A structural formula always identifies the location of the chemical bonds between the atoms of a molecule. A structural formula always consists of the symbols for the atoms connected by the short lines that represent the chemical bonds. The one, two, or three lines standing for the single, double or triple bonds respectively.
2. How Glycerol Reach the Oxalic Acid? Also, Write What is a Projection Formula?
Ans: When the glycerol is heated with the oxalic acid at the temperature of 100 to 110 degrees celsius then formic acid is produced as one of the products and the elimination of water. At the higher temperature of 260 degrees Celsius to 280-degree Celsius, the oxalic acid, as well as the glycerol, reacts with each other to produce allyl alcohol which is also produced via the decarboxylation and the elimination of water.
A projection formula is a two-dimensional representation of what actually is a three-dimensional molecule. Such a formula resembles the structural type in that it consists of symbols representing the atoms of constituent elements connected to each other by the dashes or the curves that stand for the chemical bonds. Therefore the methane molecule is characterized by a tetrahedral disposition of the four chemical bonds that take around the carbon atom. This is conveniently represented by the projection formula.