# Does anyone know all the equations for chemistry EDEXCEL

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#1
I’m doing my chemistry paper on Friday and I don’t know how to do any of the maths equations
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4 weeks ago
#2
(Original post by billiefan)
I’m doing my chemistry paper on Friday and I don’t know how to do any of the maths equations
Since you're doing paper 1, you're expected to know all of the equations from the Calculations involving masses topic, and from Quantitative Analysis.
This includes:
mass = Mr x mol
Avogadro's constant = 6.02 x 10^23
number of particles = mol x 6.02 x 10^23
conc (mol/dm3) = mol / vol (dm3)
conc (g/dm3) = mass (g) / vol (dm3)
percentage yield = (actual yield x 100)/theoretical yield
atom economy = (Mr of desired product x 100) / Mr of all products

You also need to be able to do reacting mass calculations and titration calculations (assuming you're doing Sep Higher Chem).
0
#3
(Original post by lizz-ie)
Since you're doing paper 1, you're expected to know all of the equations from the Calculations involving masses topic, and from Quantitative Analysis.
This includes:
mass = Mr x mol
Avogadro's constant = 6.02 x 10^23
number of particles = mol x 6.02 x 10^23
conc (mol/dm3) = mol / vol (dm3)
conc (g/dm3) = mass (g) / vol (dm3)
percentage yield = (actual yield x 100)/theoretical yield
atom economy = (Mr of desired product x 100) / Mr of all products

You also need to be able to do reacting mass calculations and titration calculations (assuming you're doing Sep Higher Chem).
Thank u do u know the ones for paper 2 higher Edexcel chemistry
0
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