h20 molecule

Water is the chemical substance with chemical formula H. O; one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. Water is a tasteless, odorless liquid at ambient temperature and pressure.There are 12 of these molecules. The smaller number is the number of atoms of the element to the left of it. No number means one atom. For CO2 there is one atom of carbon and two atoms of oxygen.

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