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Chemistry

Molecular Mass and Formula Mass

Molecular Mass: The sum of atomic masses of all the atoms present in one molecule of a molecular substance, is its molecular mass. For example, molecular mass of chlorine (Cl2 ) is 71.0 amu, of water (H2O) is 18 amu and that of carbon oxide (CO2) is 44 amu.

How to Write Chemical Formula – Definition, Types and Significance of Formula

Chemical formula: The symbolic representation of all the elements(atoms) in the compound is called chemical formula. OR The way of representing of a molecule or a compound using the symbols of its elements. How to write a Chemical Formula: Compounds are represented by chemical formulae as elements are represented by symbols. Chemical formulae of compounds are written …

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Mixture vs Compound

when two or more substances (elements or compounds) mix up physically without any fixed ratio by mass, they form a mixture. Mixture is of two types.   HOMOGENOUS MIXTURE: Mixtures that have uniform composition throughout are called homogeneous mixtures e.g. air, gasoline, ice cream.

Major Branches of Chemistry

Science: word science is derived from “scientia” means “knowledge”. The knowledge that provides understanding of this world and how it works is called science. The knowledge obtained through observations and experiments is called science.

Chemical Equilibrium

Chemical Equilibrium   Q1. Describe a reversible reaction with the help of an example and graph. Answer: Reversible reaction:  A reaction in which the products recombine to form reactants is called reversible reaction. OR  a reaction that proceed both in forward as well as reverse direction is called reversible reaction. Representation: A reversible reaction is represented …

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