MOLECULAR FORMULA DEFINITION
A formula which tells the actual number of atoms present in a molecule of a substance is known as molecular formula.
Examples: H2O2 and C6H12O6 are the molecular formulas of hydrogen peroxide and glucose respectively.
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Law of definite proportions
This Law was given by Joseph Proust. According to this law, “A chemical compound always consists of the same elements in the same ratio by weight”. For example, samples of CO2 obtained by different methods always contain the same elements, i.e., carbon and oxygen in the same ratio, i.e., 3: 8 by weight.
Mole Chemistry | Mole Concept | Mole Unit
Below are some important points to get clear mole concept, definition of mole chemistry and mole units. Mole can be define as, The atomic mass, molecular mass, ionic mass or formula mass of a substance expressed in grams is called mole of that substance. OR The amount of a substance, which contains 6.02 x 1023…
Why is Chemistry called The Central Science?
Students & professionals from other sciences quite often ask the question, why is chemistry called the Central Science. Is it physics with the fundamental laws small blocks of built atoms added mass that allows the calculations to take place and prediction of the final product Or Is it chemistry that enables thought process atoms to…
Charles’ Law
Introduction: In 1787, Charles found a relationship between volume and temperature of gases. He announced this relationship in the form of a law known as Charles’ law: Definition: “Volume of a given mass of a gas is directly proportional to the absolute temperature at constant pressure.” Mathematical Charles Law Formula: Another Statement for Charles’ Law:…
Why Temperature Remains Constant At Boiling Point?
When a liquid is heated, the kinetic energy of its molecules increases in other words the temperature increases as well as the rate of vaporization increases. When the kinetic energy of the molecules becomes maximum i.e., boiling point is reached any further heating at this stage will not increase the temperature rather heat will only…
lattice energy definition Chemistry
The lattice energy is the energy released when one mole of the ionic crystal is formed from the gaseous ions. OR It is also defined as the energy required to break one mole of the solid into isolated ions in the gas phase. Explanation with examples: Solids are composed of atoms, ions or molecules. However,…
