Understand the basic concepts of chemistry. Click on the Link to Watch the VIDEO explanation: Watch Video
Law of chemical combinations. There are six laws that governs the combination of substances. Law of conservation of mass states that the total mass of the products equal to the total mass of reactants. Law of constant composition states that the elements combine in same proportion by mass. The law of multiple proportion states that the mass of one element combining with the other bear a simple whole number ratio to one another. The law of reciprocal proportion states that the ratio of combining masses of two elements `with the third one is same or whole no multiple of original ratio. Gay Lussac's law states that volume of reacting gasses bear a simple whole number ratio. Avogadro's law states that equal volume of all gasses contain equal number of molecules. Atoms and Molecules forms the basic building block of matter. An atom is the smallest part of an element. It also is the smallest particle of matter that can enter into chemical combination. A molecule is the smallest part of a substance that can have independent existence. It is formed when two or more atoms join together chemically. Atoms of elements are measured by their atomic mass. Their mass being miniscule, all atoms are compared on relative scale. It is 1/12th of the actual mass of Carbon 12 atom. When atomic mass of an atom is measured in gram it is called gram atomic mass. Molecules of substances are also measured by relative mass. It is defined as average relative mass of a molecule of a substance. When molecular mass is measured in gram it is called gram molecular mass. A chemical formula represents the composition and no of elements present in a molecule of a chemical compound. The molecular formula gives the actual no of atoms of each element present in one molecule of a compound. It also denotes molecular mass of a chemical substance. The empirical formula gives the simplest whole no ratio of atoms of different elements present in a molecule. Large molecules of ionic and network compounds are best described in this formula. The molecular formula will always be whole no ratio of empirical formula. A chemical equation symbolically represents a chemical reaction. According to the law of conservation of mass the changes in reactants and products must be balanced before and after reaction. Hit and trial method for simple equation and partial equation method for complex equation having many reactants and products. The mole concept is the measure of concentration of substances in the chemistry. The mol unit is based on number of atom in exactly 12 gram of pure carbon 12.
Law of chemical combinations. There are six laws that governs the combination of substances. Law of conservation of mass states that the total mass of the products equal to the total mass of reactants. Law of constant composition states that the elements combine in same proportion by mass. The law of multiple proportion states that the mass of one element combining with the other bear a simple whole number ratio to one another. The law of reciprocal proportion states that the ratio of combining masses of two elements `with the third one is same or whole no multiple of original ratio. Gay Lussac's law states that volume of reacting gasses bear a simple whole number ratio. Avogadro's law states that equal volume of all gasses contain equal number of molecules. Atoms and Molecules forms the basic building block of matter. An atom is the smallest part of an element. It also is the smallest particle of matter that can enter into chemical combination. A molecule is the smallest part of a substance that can have independent existence. It is formed when two or more atoms join together chemically. Atoms of elements are measured by their atomic mass. Their mass being miniscule, all atoms are compared on relative scale. It is 1/12th of the actual mass of Carbon 12 atom. When atomic mass of an atom is measured in gram it is called gram atomic mass. Molecules of substances are also measured by relative mass. It is defined as average relative mass of a molecule of a substance. When molecular mass is measured in gram it is called gram molecular mass. A chemical formula represents the composition and no of elements present in a molecule of a chemical compound. The molecular formula gives the actual no of atoms of each element present in one molecule of a compound. It also denotes molecular mass of a chemical substance. The empirical formula gives the simplest whole no ratio of atoms of different elements present in a molecule. Large molecules of ionic and network compounds are best described in this formula. The molecular formula will always be whole no ratio of empirical formula. A chemical equation symbolically represents a chemical reaction. According to the law of conservation of mass the changes in reactants and products must be balanced before and after reaction. Hit and trial method for simple equation and partial equation method for complex equation having many reactants and products. The mole concept is the measure of concentration of substances in the chemistry. The mol unit is based on number of atom in exactly 12 gram of pure carbon 12.
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