For example, for hydrogen, the relative atomic mass is 1. 007; for carbon, it is 12. 0107; for oxygen, it is 15. 9994; and for chlorine, it is 35. 453.
Some elements are only found in molecules of 2 atoms or more. This means that if you want to find the molar mass of elements that are composed of 2 atoms, such as hydrogen, oxygen, and chlorine, then you’ll have to find their relative atomic masses. Multiply them by the molar mass constant, and then multiply the result by 2. For H2: 1. 007 x 2 = 2. 014 grams per mole; for O2: 15. 9994 x 2 = 31. 9988 grams per mole; and for Cl2: 35. 453 x 2 = 70. 096 grams per mole. One mnemonic device for remembering diatomic elements (molecules of 2 atoms) is: Have No Fear Of Ice Cold Beverages (Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Chlorine, Bromine). [6] X Research source
For HCl, there is one atom of hydrogen and one atom of chlorine. For C6H12O6, there are 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
The relative atomic masses of the elements in hydrochloric acid are: hydrogen, 1. 007 g/mol and chlorine, 35. 453 g/mol. The relative atomic masses of the elements in glucose are: carbon, 12. 0107 g/mol; hydrogen, 1. 007 g/mol; and oxygen, 15. 9994 g/mol.
For hydrogen chloride, HCl, the molar mass of each element is 1. 007 grams per mole for hydrogen and 35. 453 grams per mole for chlorine. For glucose, C6H12O6, the molar mass of each element is: carbon, 12. 0107 x 6 = 72. 0642 g/mol; hydrogen, 1. 007 x 12 = 12. 084 g/mol; and oxygen, 15. 9994 x 6 = 95. 9964 g/mol.
For hydrogen chloride, the molar mass is 1. 007 + 35. 453 = 36. 460 g/mol. 36. 46 grams is the mass of one mole of hydrogen chloride. For glucose, the molar mass is 72. 0642 + 12. 084 + 95. 9964 = 180. 1446 g/mol. 180. 14 grams is the mass of one mole of glucose.
