Question

HOW DO YOU DIFFERENTIATE BETWEEN H20 AND O2 IN TERMS OF MOLECULES ?

Answer 1

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O2 is molecular oxygen. It is an element. Each molecule of O2 contains two oxygen atoms bonded together by covalent bonds. H2O is a compound as each molecule of water contains two atoms of hydrogen bonded to one atom of oxygen by covalent bonds. O2 exists as a gas at room temperature while H2O exists as a liquid at room temperature.

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Answer 2

H2o means hydrogen
and Co2 is carbon dioxide gas

molecular mass of H2O is :H2O = (2 x 1.01 amu) + (1 x 16.00 amu) = 18.02 amu N2O3 = (2 x 14.01 amu) + (3 x 16.00 amu) = 76.02 amu Mg(OH)2 = (1 x 24.31 amu) + (2 x 1.01 amu) + (2 x 16.00 amu) = 58.33 amu The formula mass of H2O is 18.02 amu so the molar mass is 18.02 g/mol. The formula mass of N2O3 is 76.02 amu so the molar mass is 76.02 g/mol.