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1dm^3=1l
Kazuki

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Convert to the same unit before doing a calculation
E.g. don't multiply moldm^3 by molcm^3

Ella

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when you read the question, underline and focus on anything you need to find and calculate in the formula so you don't get confused  marek&emig

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Charlie & Fioma

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Unit for mass: grams
Unit for molarity: moldm^-3

Roshan

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1dm3=1000cm3
Easy to forget to convert
Mistake: 0.50moldm-3*50cm3
Correct: 0.50moldm*0. 05dm3

Seiji and

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# of moles= mass(g)/Mr

molarity(concentration)=#of moles/volume (dm^3)

Alex K

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Don't round during a calculation so that the answer is more accurate. 

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Don't round during a calculation so that the answer is more accurate. 

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Fiona & Charlie

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Molarity is a concentration unit, defined to be the number of moles of solute divided by the volume of solution.
Ian

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mol = mass/Mr or Ar
mass = mol*Mr or Ar
Mr or Ar = mass/mol

Riddhi

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1cm3 = 0.001dm3
1000cm3 = 1dm3
Isabel

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g/dm^3 / Mr = mol/dm^3
Jinu

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mol = M * dm^3
M = mol / dm^3
dm^3 = mol / M
Liam