Calculations

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The mole
is the amount of substance in grams that has the same number of particles as there are atoms in 12g of carbon-12
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Relative atomic mass
Average mass of one atom compared to one twelfth the mass of a carbon 12 atom
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Relative molecular mass
is the average mass of a molecule compared to one twelfth the mass of a carbon 12 atom
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moles calculation
mass/mr
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ideal gas equation
PV=nRT
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what is volume measured in in gases
m^3
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concentration formula
moles/volume or conc x volume
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what is volume measured in in a solution
dm^3
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Avogadros constant
The amount of substance in grams is equal to the same number of particles there are in carbon 12. the number is 6.022 x 10^23
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How do you work out number of particles
moles of substance x avogadros number
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equation for density
mass/volume
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What is empirical formulae
The simplest ratio of atoms of each element in a compound
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Na2SO4 . xH2O has a molar mass of 322.1, Calculate the value of x
322.1-(23 x 2 +32.1 + 16 x 4) 180/18=10
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mass concentration equation
mass/volume
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what is the unit of mass concentration
g/dm^3
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calculating dilutions
original concentration x original volume/new diluted volume
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percentage yield
actual yield/ theoretical yield x 100
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percentage atom economy
mass of useful products/ mass of all reactants x 100
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uncertainty
uncertainty/measurement made on uncetainty x 100
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how do you convert cm3 into dm3
divide by 1000
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how do you convert cm3 to m3
divide by 1000000
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how do you convert dm3 to m3
divide by 1000
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how do you convert degrees to kelvin
add 273
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Other cards in this set

Card 2

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Average mass of one atom compared to one twelfth the mass of a carbon 12 atom

Back

Relative atomic mass

Card 3

Front

is the average mass of a molecule compared to one twelfth the mass of a carbon 12 atom

Back

Preview of the back of card 3

Card 4

Front

mass/mr

Back

Preview of the back of card 4

Card 5

Front

PV=nRT

Back

Preview of the back of card 5
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