How To Find Molecular Formula 13 Steps With Pictures

In this formula, n is the number of moles, P is the pressure, V is the volume, T is the temperature in Kelvin, and R is the gas constant. Example: n = PV/RT = (0. 984 atm * 1 L) / (0. 08206 L atm mol-1 K-1 * 318. 15 K) = 0. 0377 mol

In this formula, n is the number of moles, P is the pressure, V is the volume, T is the temperature in Kelvin, and R is the gas constant. Example: n = PV/RT = (0. 984 atm * 1 L) / (0. 08206 L atm mol-1 K-1 * 318. 15 K) = 0. 0377 mol

Example: 14. 42 g / 0. 0377 mol = 382. 49 g/mol

For example, carbon has an atomic weight of 12. 0107, hydrogen has an atomic weight of 1. 00794, and oxygen has an atomic weight of 15. 9994. It’s okay to look up the atomic weight if you don’t know it. Example: (12. 0107 g * 12) + (15. 9994 g * 1) + (1. 00794 g * 30) = 144. 1284 + 15. 9994 + 30. 2382 = 190. 366 g

Example: 382. 49 / 190. 366 = 2. 009

Example: C12OH30 * 2 = C24O2H60

Example: 75. 46 g C, 8. 43 g O, 16. 11 g H

Example: 75. 46 g C * (1 mol / 12. 0107 g) = 6. 28 mol C 8. 43 g O * (1 mol / 15. 9994 g) = 0. 53 mol O 16. 11 g H * (1 mol / 1. 00794) = 15. 98 mol H

Example: Smallest molar amount is oxygen with 0. 53 mol. 6. 28 mol/0. 53 mol = 11. 83 0. 53 mol/0. 53 mol = 1 15. 98 mol/0. 53 mol= 30. 15

Example: The empirical formula would be C12OH30 11. 83 = 12 1 = 1 30. 15 = 30

There are several different types of structural representations, which show you different things about the compound. For example, it might show the compound’s connectivity or its molecular shape, such as by drawing dashed lines to indicate their bonds.