Question

Q. (a) Does a balanced chemical equation give the
actual masses of reactants and products?
(b) Does it give relative volumes of different
substances?
(c) How can the actual masses be obtained?​

Answer 1

Answer:

Explanation:

a) A balanced chemical equation for the given chemical reactions is to be stated. Concept introduction: According to the law of conservation of mass, mass can neither be created nor destroyed. The mass of reactants is equal to the mass of products formed during a chemical process.

b) Equal volumes of different substances have different masses or weights. For example 1 m3 of lead weighs differently from 1 m3 of wood. Also 1 m3 of water has a weight different from that of sulphuric acid or palm oil of the same volume. This is due to differences of in the quality of the substances known as density.

c) The formula mass for an ionic compound is calculated in the same way as the formula mass for covalent compounds: by summing the average atomic masses of all the atoms in the compound’s formula.

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