Chemical terms
Chemical processes
100

What is chemistry?

Chemistry is the scientific discipline involved with elements and compounds composed of atoms,molecules and ions

200

Molecule is....

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

300

Molality (m) is...

Molality (m), or molal concentration, is the amount of a substance dissolved in a certain mass of solvent. It is defined as the moles of a solute per kilograms of a solvent.

400

Hydration is...

The addition of water to a chemical molecule without hydrolysis.

400

Percent composition is calculated from ...

Percent composition is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound. This value is presented as a percentage. 

500

Hydrolysis is...

Hydrolysis is any chemical reaction in which a molecule of water ruptures one or more chemical bonds. The term is used broadly for substitution, elimination, and solvation reactions in which water is the nucleophile.

500

Name the key difference between hydration and hydrogenation 

The key difference between hydration and hydrogenation is that hydrationrefers to the addition of water molecules to an organic compound, whereashydrogenation refers to the addition of a hydrogen molecule to an organic compound.