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Chemistry Paper 1
Quantitive Chemistry
Atom economy
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Atom economy
the measure of the amounts of starting materials that end up as useful products atom economy= total Mr of desired products/total Mr of all reacatants
Percentage yield
A measure of how much product is actually calculated from
100 X actual yield/
theoretical yield
Mole Ratio
If the mole ratio of gaseous reactants and products is known, reacting volumes can be calculated
Avogadro’s Law
At given
temperature
and pressure,
equal
volumes of different gases contain an equal number of molecules
Molar gas volume
the
molar volume
of any gas at room temperature is
24 dm3
The volume of gas is calculated using:
Volume= amount in mol X molar volume