3) Amount Of Substance Flashcards
(14 cards)
Define relative molecular mass.
The mass of a molecule, as compared to 1/12th the mass of carbon-12.
Define relative formula mass.
The sum of the relative atomic masses of all the atoms in a chemical formula.
Give the Avogadro constant.
6.02x10^23
Define molar mass.
Mass per mole.
How much space does 1 mole of gas take up?
24 dm cubed
Define empirical formula.
The simplest whole number ratio of atoms of each element present in a compound.
Define molecular formula.
The number and type of atoms of each element in a molecule.
Define anhydrous.
Doesn’t contain water.
Define hydrated.
Containing water molecules within its crystal structure.
Define water of crystallisation.
The water contained within the crystal structure of a molecule.
What is the ideal gas equation?
PV=nRT
What does the R stand for in the ideal gas equation?
8.314 J/mol
What is percentage yield?
Actual yield divided by theoretical yield, multiplied by 100.
What is atom economy?
The sum of the molecular masses of the desired product(s) divided by the sum of the molecular masses of all products, multiplied by 100.
