Скачать или смотреть NIOS Plus Two: Chemistry Chapter 01 | natdemy

• Chemistry plays an important role in many aspects of our life like health and
• medicine, energy and environment, materials and technology, food and agriculture.
• Matter has particulate matter.
• According to the law of conservation of mass, in any chemical reaction, the total mass of all the reactants is equal to the total mass of all the products.
• According to the law of definite proportion, in a chemical compound, the proportions by mass of the elements that compose it are fixed and independent of the origin of the compound or its mode of preparation.
• According to the law of multiple proportions when two elements form two or more compounds, the masses of one element that combine with a fixed mass of the other element are in the ratio of small whole numbers.

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