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Six-Year Molar: The first permanent tooth to erupt, usually between the ages of five and six.

Premolar: Another name for bicuspid.

Standard Molar Entropy: The entropy of one mole of a substance in its standard state.

Standard Molar Volume: The volume of 1 mole of an ideal gas at STP, equal to 22.414 liters.

Third Molar: The last of the three molar teeth, also called wisdom teeth. There are four third molars, two in the lower jaw and two in the upper jaw, one on each side. Some people are born without third molars.

Molars: The broad, multicusped back teeth, used for grinding food are considered the largest teeth in the mouth. In adults there are a total of twelve molars (including the four wisdom teeth, or thi . . . View Full Definition

Molarity: Concentration of a solution measured as the number of moles of solute per liter of solution. For example, a 6 M hcl solution contains 6 moles of hcl per liter of solution.

Molar Absorptivity: The absorbance per centimeter of path length when the concentration of absorbing material is 1 M; epsilon = A/(bc) where a, A, b, and c are the molar absorptivity, absorbance, path length in . . . View Full Definition

Molar: 1. Of or pertaining to moles. 2. An synonym for molarity; for example, a 'six molar solution of hydrochloric acid' contains 6 moles of hcl per liter of solution.

Molar Heat Capacity: The heat required to raise the temperature of one mole of a substance by 1°C is called the molar heat capacity of the substance. Molar heat capacity is an intensive property with SI system u . . . View Full Definition