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Science Tips

	Chemistry - Mass Number The MASS NUMBER, A, equals the sum of the number of protons and neutrons present in the nucleus.
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	Chemistry - Molarity M: Molarity is defined as the number of moles of solute per liter of solution.
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	Chemistry - Homogeneous Equilibria Equilibria that involve only a single phase.
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	Chemistry - Beta Particles BETA particles are the same as electrons, but originate from within the nucleus and have the nuclear symbol: 0 e -1
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	Chemistry - Chemical Thermodynamics CHEMICAL THERMODYNAMICS (thermo = heat, dynamics = movement, so, heat movement) is the study of energy and its interconversions.
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	Chemistry - Exothermic Change EXOTHERMIC change is one in which thermal energy is given off. The temperature of the system goes up.
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	Chemistry - Electrons ELECTRONS are extremely small particles (much smaller than an atom) with a unit negative charge.
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	Chemistry - Mass% MASS % is the ratio of the mass of a component to the total mass of a sample times 100. Mass % = (# g solute / # g solution) x 100.
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	Chemistry - Dilute Solutions DILUTE solutions have a relatively small amount of solute.
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	Chemistry - 2nd Law of Thermodynamics SECOND LAW OF THERMODYNAMICS: In any spontaneous process there is always an increase in the entropy of the universe
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	Chemistry - Chemical Kinetics CHEMICAL KINETICS is the study of how fast reactions occur.
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	Chemistry - Homogeneous Mixtures HOMOGENEOUS MIXTURES have only one phase. They have the same properties throughout a sample, although the properties of different samples may be different.
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	Chemistry - Concentrated solutions CONCENTRATED solutions have a relatively large amount of solute.
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	Chemistry - Surroundings SURROUNDINGS: Everything outside of the system under study.
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	Chemistry - Strong Bases The hydroxides of all IA metals and of Ca, Sr, Ba, (and Ra) in Group IIA are strong electrolytes.
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	Chemistry - Strong electrolytes Completely ionized in solution - in the conductivity apparatus, the light is bright.
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	Chemistry - Unsaturated Solutions UNSATURATED solutions contain a lower concentration of solute than a saturated solution.
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	Chemistry - Spontaneous Change SPONTANEOUS change is one that takes place by itself.
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	Chemistry - Nonspontaneous Change NONSPONTANEOUS change can be made to take place by supplying energy.
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	Chemistry - <=> symbol <=>: This symbol is used for the double arrow of an equilibrium reaction.
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