The formula for bromic acid is HBrO3. H is the chemical symbol for hydrogen, Br is the chemical symbol for bromine and O is the chemical symbol for oxygen.
The number 3 after the O symbol indicates that the molecule contains three atoms of oxygen. The lack of a number after both the H nor Br symbols indicates that the compound contains one atom of each element. The molecule contains double bonds between the bromine atom and two of the oxygen atoms, and it contains a single bond between the bromine atom and the OH. The molar mass of bromic acid is 128.91 grams per mole.