Module 2 - Atoms and moles 0.0 / 5 ? ChemistryMolesA2/A-levelOCR Created by: HatsbCreated on: 17-10-19 19:20 What is an isotope Atoms of an element with the same number of protons but different numbers of neutrons 1 of 15 What is relative isotopic mass Mass of an atom of an isotope of an element compared to 1/12 of the mass of an atom of carbon 12 2 of 15 How do you calculate relative atomic mass Multiply each relative isotopic mass by % relative isoptopic abundance and add up the results then divide by 100 3 of 15 What is isotopic abundance The relative amount of a particular isotope occuring in a sample of an element 4 of 15 What is relative molecular mass The average mass of a molecule compared to 1/12 of the mass of an atom of carbon 12 5 of 15 What is a mole The unit of amount of substance one mole is roughly 6.02 x10(23) particles 6 of 15 What is molar ratio The ratio of the number of moles of each reactant and product in a balanced chemical equation 7 of 15 What us a molecular formula A way of representing molecules that shows the actual number of atoms of each element in a molecule 8 of 15 What is molar mass The mass of one mole of something 9 of 15 What is an ionic equation An equation which only shows the reacting particles of a reaction involving ions 10 of 15 What is the equation for moles (1) Mass of substance / molar mass 11 of 15 What is the equation for moles (gas v) Volume in dm3 / 24 12 of 15 What is the ideal gas equation pV = nRT 13 of 15 What is the equation for moles (conc) Concentration x volume in cm3 / 1000 14 of 15 What is concentration A measure of how many moles of a substance are dissolved in a volume of solution 15 of 15
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