Mole

The weighted average mass of an elements isotopes, based on 112 the mass of a carbon-12 atom. Average atomic mass. Average atomic mass is the calculated mean mass of an element's isotopes, taking into account their natural abundance.

6.02 10, the number of particles in one mole of a substance, Avogadro's number. It is a constant used to measure the amount of atoms or molecules in a given sample.

The simplest whole-number ratio of atoms in a compound. Empirical formula. An empirical formula shows the smallest ratio of different types of atoms in a compound.

The mass of one formula unit of an ionic compound, in atomic mass units, is called the formula mass. Formula mass is the total weight of all the atoms in the simplest version of an ionic compound.

A compound that has water chemically attached to its ions. Hydrate. In simple terms, a hydrate is a chemical compound that contains water molecules bound to it.

The ratio of moles of solute dissolved in one kilogram of solvent. Molality. Molality is a measure of concentration used in chemistry to express how much of a substance is mixed with a specific amount of solvent.

The mass in grams of one mole of any substance. Molar mass. Molar mass is the weight of one mole of a substance, making it easy to compare how much of one substance is needed relative to another in chemical reactions.

The volume of one mole of gas at 1 atm and 0C, equal to 22.4L. molar volume. Molar volume is the space that one mole of a gas occupies under certain conditions.

The number of moles of solute dissolved per liter of solution. Molarity. Molarity measures how concentrated a solution is by showing how many moles of a substance are present in one liter of liquid.

The mole is the unit of amount in chemistry. A substance that contains 6.02 10 representative particles. A mole is a counting unit used in science to measure large quantities of tiny entities, like atoms or molecules.

A fraction equal to the number of moles of a component, divided by the total number of moles in a solution. Mole fraction. In simple terms, mole fraction is a way to express the concentration of one component in a mixture by comparing it to the total amount of all components combined.

The ratio between the number of moles of any two substances in a balanced equation. Mole ratio. In simple terms, a mole ratio shows how much of each substance participates in a chemical reaction.

A formula of the number of atoms of each element in one molecule of a substance. Molecular formula. The molecular formula shows the exact number of each type of atom in a single molecule of a substance.

The percentage by mass of each element in a compound. Percent composition. Percent composition tells you how much each element contributes to the total weight of a compound.