Flashcards
Chemistry GCSE Equations/Formulas Paper 1
Cards in this deck (14)
- 1WATER FORMULAH20
- 2AMMONIA FORMULANH3
- 3CARBON DIOXIDECO2
- 4CHLORINECl2
- 5HYDROGENH2
- 6OXYGENO2
- 7RELATIVE ATOMIC MASS (Ar)Multiply each relative isotopic mass by its relative abundance then add up the results
Then divide by the sum of the abundances - 8Relative Formula Mass (Mr)Find the relative atomic masses then add them all together to get the relative formula mass
- 9Empirical FormulaEmpirical Formula of glucose
C6H12O6
numbers in molecular formula
are 6 : 12 : 6
simplify the ratio by the biggest number that goes into 6 12 6 so 6 divide all three numbers by 6 and the empirical formula is CH2O - 10Avagrados Constant (You will need to calculate number of particles)6.02x10 to the power of 23
- 11Number of ParticlesExample: Oxygen
How many atoms are there in five moles of oxygen?
Oxygen has 2 atoms it is O2
Avogrados Constant multiplied by number of moles
6.02x10 to the power of 23 multiplied by 5 = 3.01 x 10 to the power of 24 there are 2 atoms in oxygen so multiply it by 3.01 x 10 to the power of 24. so the answer is 6.02 x 10 to the power of 24 - 12Concentration =Mass of Solute
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Volume of Solution - 13RrDistance Travelled by Solute
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Distance travelled by solvent - 14Equation for NeutralisationAcid + Base ---> Salt + Water