Question

why do we write subscript on with chemical formula?
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Answer 1

Answer:

to indicate the number of atoms of an element present in am molecule or formula unit

Explanation:

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Answer 2

Explanation:

Chemistry students use subscripts to calculate the number of moles (a measurement of the amount of a substance) of each element on each side of the equation. It's important to remember that each subscript is an unchangeable part of a compound's identity.