The letter H represents which element/atom in a chemical equation?

The molecules on the left side of an equation are these.

How many hydrogens and oxygens are present in a single hydrogen peroxide molecule?

The molecules on the right side of an equation are these.

This number tells you how many of an atom is present in any given formula. It is written to the right and slightly below the atom.

Bubbling, color change, formation of gas, formation of precipitate, odor change, endothermic or exothermic reaction.

This number tells you how many molecules are present in total. It is written to the left of the molecule.

What are the three states of matter?

Balance this equation:

____N2 +____H2---> ____ NH3