Quantitative Chemistry Definitions 0.0 / 5 ? ChemistryChapter 1International BaccalaureateNone Created by: i3lenaCreated on: 09-04-15 22:37 A mole The amount of a substance which contains the same number of chemical species as there are atoms in exactly 12g of the isotope carbon-12. 1 of 16 Relative atomic mass The average mass of an atom of the element, taking into account all its isotopes and their relative abundance, compared to one atom of carbon-12. 2 of 16 Molar mass The mass of one mole of a species. It is expressed in g/mol. 3 of 16 Relative molecular mass The suym of the relative atomic masses of the atoms in the molecular formula. 4 of 16 Avogadro's constant 6.02 x10^23 5 of 16 Empirical formula Gives the ratio of the atoms of different elements in a compound. It is the molecular formula expressed as its simplest ratio. 6 of 16 Molecular formula Shows the actual number of atoms of each element present in a molecule. 7 of 16 Limiting reagent The reactant that determines the theoretical yield of product. 8 of 16 Theoretical yield The mass or amount of product produced according to the chemical equation assuming 100% reaction. 9 of 16 Percentage yield formula Experimental yield / Theoretical yield x100 10 of 16 Absolute temperature The temperature of a substance proportional to the average kinetic energy of its particles. 11 of 16 Absolute zero 0 K; the temperature of minimum kinetic energy. 12 of 16 STP Standard temperature and pressure; 273 K and 100 kPa. 13 of 16 Molar volume of a gas 22.4 dm^3 = n / V 14 of 16 Avogadro's hypothesis Equal volumes of different gasses contain equal numbers of particles at the same temperature and pressure. 15 of 16 Boyle's law P = 1 / V at constant temperature. 16 of 16
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