Chemistry Moles
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10 Terms
What is a mol?
The unit for the amount of substance
Formula for moles
Moles = Mass/Mr
Formula for percentage yield
Actual yield/theoretical yield X 100
Formula for concentration
Concentration = Moles/Volume
Formula for volume
Volume = Moles x 24
How to work out the percentage mass of an element in a compound?
Atomic mass x Number of atoms / Molecular mass of the whole compound X 100
What is empirical formula?
Empirical formula is the simplest whole number ratio of the atom type in the substance
What is molecular (chemical) formula?
Molecular (chemical) formula tells us how many of each type of atom is in the substance
How to work out molecular formula from empirical formula?
Divide the relative formula mass of the molecular formula by the relative atomic mass of the empirical formula
Multiply each number in empirical formula by this number
How do you turn cm³ into dm³?
Divide by 1000
