The quantity of a substance in moles is equal to the volume in liters of the ideal gas divided by 22.4 L/mol. You’ll still use a formula, but you do not need the molar mass of the gas for the conversion. The process for converting the volume of an ideal gas to moles is a little different than for mass. You can use the calculator above to calculate this more easily or even our grams to moles calculator to quickly convert grams to moles and moles back to mass. So, in this example, the quantity of 120 grams of aluminum oxide equals 1.18 moles. Note that the molar mass of aluminum oxide is 101.96 g/mol. Therefore, you need to be able to convert from weight and volume to moles and vice versa to conduct experiments in a laboratory or carry out reactions to manufacture products in industry.įor example, let’s calculate the quantity in moles equal to 120 grams of aluminum oxide, Al 2O 3. Using moles in chemical equations shows exactly how the reactants transform to make the products. However, most chemical equations are written in terms of moles so that the number of atoms of each type balances out on both sides of the equation. This conversion is useful because most chemicals are stored and measured either by weight (g) or volume (L). Below we’ll also cover how to convert volume and molecules to moles as well. Follow along, and we’ll show you how to convert mass to moles in just a few steps. You might be wondering how you can calculate the number of moles given a mass, volume, or amount of substance. Since the mole is a measure of quantity, all substances have the same number of atoms, molecules, and other particles in one mole of the substance. Because it’s such a large number, scientific notation is almost always used to represent it. This numerical value is known as the Avogadro constant or Avogadro’s number. One mole is equal to 6.02214076 × 10 23 elementary entities, such as atoms, molecules, electrons, or ions. It’s used as a standard measurement for a very large quantity of very small units of matter. The mole, abbreviated mol, is the SI base unit to measure the amount or quantity of a substance.
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