# Amount of substance

- Created by: LauraNannini
- Created on: 20-04-20 07:08

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- Topic 5
- Solids
- Moles = mass/ Mr

- Gases
- Moles = volume/ 24dm^3

- Solutions
- Concentration = moles/ volume

- Density
- Density = mass/ volume

- Number of particles
- No. particles = moles x 6.02x10^23

- % Yield
- Actual mass/ theoretical mass x100

- Atom economy
- Desired product mass/ Total mass of products x100

- Ideal gas equation
- pV = nRT
- P= pressure in pa
- V= volume in m^3
- T = Temperature in Kelvin
- R= gas constant 8.31

- Empirical formula
- divide each percentage or mass by the elements Mr and then divide everything by the smallest value
- Has to be a whole number

- divide each percentage or mass by the elements Mr and then divide everything by the smallest value
- Molecular formula
- Divide the total formula mass by the empirical mass
- times the product by this value

- Divide the total formula mass by the empirical mass

- Solids

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