What are coefficients used for in a chemical equation?
Answer and explanation
Correct answer: To make the number of atoms of each element equal on both sides of the equation
Coefficients are written before chemical formulae and indicate the number of units of each substance involved. They are adjusted to make the number of atoms of every element equal on both sides of an equation, in accordance with the law of conservation of mass. In contrast, changing a subscript within a chemical formula changes the identity of the substance, so option B is incorrect.
Frequently asked questions
What is the correct answer to this question?
To make the number of atoms of each element equal on both sides of the equation
Why is this the correct answer?
Coefficients are written before chemical formulae and indicate the number of units of each substance involved. They are adjusted to make the number of atoms of every element equal on both sides of an equation, in accordance with the law of conservation of mass. In contrast, changing a subscript within a chemical formula changes the identity of the substance, so option B is incorrect.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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