What is a chemical formula?

What is the chemical formula of hypophosphorus acid?

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When carbondioxide is bubbled through A, it turns cloudy. What is the chemical formula of A?

Why is the chemical formula for water H_2O and for sodium chloride NaCl, why not HO_2 and NaCl_2 ?

What are the rules you have to follow while writing a chemical formula?

What is a chemical equation?

what is plaster of Paris. give its chemical formula?

Name the organic acid present in vinegar-write it's chemical formula.

What is a chemical change ? What are its properties ?

why are some salts are called hydrated salts give 2 example of white colour hydrated salts with the chemical formula?

What is calgon ? Give its chemical formula