Question

in chemistry these subscripts is depend on what?? how can we put them while balancing a chemical equation
plzzzzz tell me..
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Answer 1

the subscripts depends on the medium at which the substance is used or produced in a chemical reaction   its not important to mark the subscripts in every balancing equation...if the question asks u to...u must

Answer 2

I think u are talking about the subscript 2 in H₂, O₂, Cl₂ and so on.

This is because those individually with the subscripts signifies a molecule of that element, while without the subscript it signifies an atom of that element.

For example if anyone tells u to write a hydrogen atom, the answer will be H.

But if it is told to write a hydrogen molecule, the correct answer will be H₂.

This is only because 2 hydrogen atoms bind together to form an hydrogen molecule. Just like Cl₂, O₂, N₂ etc.

In case of chemical compounds, subscript signifies the number of atoms of that particular element took part in the formation of it. Like in H₂SO₄; 2 atoms of hydrogen 1 atom of sulphur and 4 atoms of oxygen took part.