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whats Relative Formula/Molecular Mass (Mr)
The mass of all the elements in the compound added together.
how to calculate the mr of a substance
Work out how many atoms of each element there are in the chemical formula​ Add together the Ar values (mass) for all the atoms of each element present
what is Avogadro’s Constant
6.02 x 10^23
what does the Ar tell you
the mass in grams of one mole of the substance.​
what is the equation to find the number of moles
mass / formula mass
what does concentration refer to
the number of moles dissolved in 1dm^3 of a solution
equation to find the concentration of a substance
moles / volume
what is morality
a concentration unit for the amount of substance per volume