Amount of Substance Definitions 0.0 / 5 ? ChemistryCalculationsASAQA Created by: elliebissekerCreated on: 04-12-17 18:17 Avagadro's Constant 6.02*10^23, the number of entities in one mole of a substance 1 of 32 Empirical Formula the simplest whole number ratio of atoms of each element in a compound 2 of 32 Molecular Formula the simplest whole number representation of the actual number of atoms of each element in a compound 3 of 32 (AR) Relative Atomic Mass average mass of an atom of an element/ 1/12 the mass of one atom of Carbon-12 4 of 32 (MR) Relative Molecular Mass average mass of 1 molecule of element/compound/ 1/12 the mass of one atom of Carbon-12 5 of 32 Mole amount of entities per mole, where Carbon-12=12 6 of 32 1 tonne 1,000,000g 7 of 32 1kg 1,000g 8 of 32 1mg 0.001g 9 of 32 cm^3------dm^3 /1000 10 of 32 mol/dm^3-------g/dm^3 *Mr 11 of 32 Atom economy mass of desired product/ mass of total product *100 12 of 32 Percentage Yield actual/theoretical *100 13 of 32 Why is there never 100% yield? impure reactants, nonreactive reactants, reversible,gas escaped, side reactions 14 of 32 kPa-----Pa *1000 15 of 32 MPa-----Pa *1,000,000 16 of 32 cm^3-----m^3 /1,000,000 17 of 32 dm^3-----m^3 /1000 18 of 32 gas constant 8.31 Jmol-k-1 19 of 32 degrees----kelvin +273 20 of 32 At STP (25C,100kPa) one mole occupies 22.4dm^3 21 of 32 At RTP (20C,100kPa) one mole occupies 24dm^3 22 of 32 conc=moles/vol conc=mold/dm^3 volume=dm^3 23 of 32 number of particles= moles*Avagadro's 24 of 32 Acid+Alkali salt +water 25 of 32 metal+acid salt+hydrogen 26 of 32 base+acid salt+water 27 of 32 acid+carbonate salt+water+co2 28 of 32 ammonia+acid ammonium salt 29 of 32 metal+ halogen metal halide 30 of 32 metal carbonate metal oxide*co2 31 of 32 metal+h2o metal hydroxide+hydrogen 32 of 32
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