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The sum of the molalities of all solute particles in a solution.

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Atomic Weight

Weighted average of the masses of the constituent isotopes of an element, The relative masses of atoms of different elements.

Anode

In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.

Hydrometer

A device used to measure the densities of liquids and solutions.

Calorimeter

A device used to measure the heat transfer between system and surroundings.

Structural Isomers

Compounds that contain the same number of the same kinds of atoms in different geometric arrangements.

Endothermicity

The absorption of heat by a system as the process occurs.

Radioactive Dating

Method of dating ancient objects by determining the ratio of amounts of mother and daughter nuclides present in an object and relating the ratio to the object?s age via half-life calculations.

History of diamonds

Diamond has been known for about 5 thousand years. Historians suggest that it was first discovered in India in river placers. It has long been credited with magical properties, and the largest famous crystals and products from them are shrouded in a halo of mystical legends.

Flash Point

The temperature at which a liquid will yield enough flamable vapour to ignite. There are various recognized industrial testing methods, therefore the method used must be stated.

Barometer

A device for measuring pressure.