Mass Spectrometry - Look at the graph*, multiply each relative isotopic mass by its relative isotopic abundance and add up the result. Divide the result by the sum of the isotopic abundances.
*You will always be given a graph to take the values from for this.
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Number of Moles = Number of particles you have / Avogadro's Constant* (6.02 X 10^(23))
*Avogadro's Constant represents the number of particles in a mole.
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Number of moles = Volume (dm^(3)) / Molar gas volume*
*At room temperature, just use 24dm^(3) mol^(-1).
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Ideal Gas Equation - pV=nRT
p= Pressure (Pa), V= Volume (m^(3)), n= Number of Moles, R= 8.314JK^(-1) mol^(-1) [This is called the Gas Constant], T= Temperature (K). This equation is easy to remember because it looks like 'Pervert' :).
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n= Mass (g) / M
This is the same equation as Mass= Mr Moles :).
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Percentage Yield = (Actual Yield / Theoretical Yield) X 100%*
*Where it says '100%', literally just type '100%' into your calculator when using this equation..
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Number of Moles= ( Concentration X Volume (cm^(3)) ) / 1000
Use this version of this equation if you are given a volume in cm^(3).
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Number of Moles= Concentration X Volume (dm^(3))
Use this version of this equation if you are given a volume in dm^(3).
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q=mcΔT
q= energy lost or gained, m= mass (g) of water in calorimeter or solution in insulated container, c= specific heat capacity* (water= 4.18Jg^(-1)K^(-1)), ΔT= Change in Temperature (K (same as °C) *You usually use the specific heat capacity for water.
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Enthalpy Change of Reaction = Total Energy Absorbed - Total Energy Released
This is just a basic working out the difference equation (subtraction sum).
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Rate of Reaction = Amount of Reactant Used or Product Formed / Time
Not much to read back here... sorry :).
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Rate of Reaction from a Gradient Graph - Rate of Reaction = Gradient = change in y / change in x
Use this equation to work out the rate of reaction from a graph.
Square brackets = mol dm^(3). aA+bB ⇌ cC+dD, Caps= Substances in the equation, Lower Case= Number of moles of the substance.
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Other cards in this set
Card 2
Front
*Avogadro's Constant represents the number of particles in a mole.
Back
Number of Moles = Number of particles you have / Avogadro's Constant* (6.02 X 10^(23))
Card 3
Front
*At room temperature, just use 24dm^(3) mol^(-1).
Back
Card 4
Front
p= Pressure (Pa), V= Volume (m^(3)), n= Number of Moles, R= 8.314JK^(-1) mol^(-1) [This is called the Gas Constant], T= Temperature (K). This equation is easy to remember because it looks like 'Pervert' :).
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