Concentration
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In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes in solutions. The molar (amount) concentration has variants such as normal concentration and osmotic concentration.
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Psychology
- Attentional control, the cognitive process of controlling the focus of attention
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