Which of the following cannot be a molecular formula for an empirical formula HO?

How many significant figures are there in 60.6?

Which of the following is a chemical change?

Seeds of Manhua plant and oil of Eranda were used in making ____

Calculate the mass percent of magnesium in the formation of magnesium oxide.

What are pure substances classified as?

Atoms of different elements differ in mass.

What’s the molecular mass of carbon dioxide?