Chemistry Equations / Maths

Description

GCSE Chemistry Flashcards on Chemistry Equations / Maths , created by Georgia B on 03/04/2014.
Flashcards by Georgia B, updated more than 1 year ago
 Created by Georgia B almost 10 years ago
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Resource summary

 Question Answer RAM of an isotope mass of each isotope by its relative abundance added together / relative abundance RFM RAMs of each atom in molecule added together Empirical formula List elements, write experimental masses, divide by atomic no., even out molecular formula find mass of empirical formula, relative molecular mass/ans, empirical formula x empirical unit Masses in a reaction balanced equation, find RFM of required parts in equation, divide to get one then multiply to get all percentage yield (actual yield/theoretical yield) x 100 number of moles mass in g / RAM (or RFM) volume (mass/RAM) x 24 = dm3 (mass/RAM) x 24000 = cm3 concentration no. of moles / volume electrolysis no. of moles = charge / charge of ion x faraday constant (which is 96000) acid + metal salt + hydrogen metal + water metal hydroxide + hydrogen less reactive metal + steam metal oxide + hydrogen iron + oxygen + water (Rusting) hydrated iron (III) oxide (rust) Production of O2 2H2O2 (aq) ---> 2H2O (l) + O2 (g) Alkanes CnH2n+2 Complete Combustion alkane + oxygen carbon dioxide + water Incomplete Combustion alkane + oxygen carbon + carbon monoxide + carbon dioxide + water Alkenes CnH2n acid + base salt + water acid + metal oxide salt + water acid + metal carbonate salt + water + carbon dioxide acid + insoluble base (making soluble salts) salt + carbon dioxide + water titration no. of moles of known substance, according to equation work out no. of mole of unknown substance, work out its concentration rate of reaction amount of reactant used or amount of product formed / time enthalpy change total energy absorbed to break bonds - total energy released in making bonds the Haber Process N2 (g) + 3H2 (g) <-----> 2NH3 (g) (+ heat)

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