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Density is the ratio b/w Mass and Volume: D=M/V

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Chemical Change

A change in which one or more new substances are formed.

Atomic Mass Unit (amu)

One twelfth of a mass of an atom of the carbon-12 isotope, a unit used for stating atomic and formula weights, also called dalton.

Reactants

Substances consumed in a chemical reaction.

Reverse Osmosis

Forcing solvent molecules to flow through a semipermable membrane from a concentated solution into a dilute solution by the application of greater hydrostatic pressure on concentrated side than the osmotic pressure opposing it.

Raoult's Law

The vapor pressure of a solvent in an ideal solution decreases as its mole fraction decreases.

Metallic Conduction

Conduction of electrical current through a metal or along a metallic surface.

Actual Yield

Amount of a specified pure product actually obtained from a given reaction. Compare with Theoretical Yield.

Heterogeneous Catalyst

A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.

Heat Capacity

The amount of heat required to raise the temperature of a body (of any mass) one degree Celsius.

Alkaline Earth Metals

Group IIA metals