what is a chemical formulae?

Answer 1

An identification of the atoms is a molecule (APEX)

Answer 2

A chemical formula shows the atoms and their respective quantity in a compound or molecule. The chemical formula CO2 reads as carbon, one atom, oxygen, two atoms. Another example is H2O (water).
A chemical reaction is something that happens between two chemicals when they interact.

Answer 3

A chemical formula is a symbolic representation of the elements in a compound and the ratio in which they are present. It uses element symbols and subscripts to show the number of atoms of each element in a molecule or compound. For example, the chemical formula for water is H2O, indicating two hydrogen atoms and one oxygen atom.

Answer 4

A chemical formulae of a substance tells us the ratio of each atom in a compound