Chapter 3- amount of substances Flashcards
What is Avogadro’s Constant?
The number of atoms per mole of the carbon-12 isotope.
What is a mole?
The amount of any substance containing as many particles as there are particles in 12g of the carbon-12 isotope.
What is the equation for the number of moles of a substance?
n=m/Mr
n - number of moles (mol)
m - mass (g)
Mr - molar mass (g/mol)
What is molecular formula?
The number of atoms of each element in a molecule.
In hydrated salts, what is the name given to water molecules?
Waters of crystallisation
What is the concentration of a solute?
The amount of solute (in moles) dissolved in each 1dm^3 of solution
What is the equation for finding a solution’s concentration?
c=n/v
c - concentration (mol/dm^3)
n - number of moles (mol)
v - volume (dm^3)