* GCSE and basic GCE Chemical Calculations - Law of Conservation of Mass at Doc Brown's Chemistry
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Doc Brown's Chemistry - Chemical Calculations
On-line Quantitative Chemistry Calculations Online practice exam chemistry CALCULATIONS and solved problems for KS4 Science GCSE/IGCSE CHEMISTRY and basic starter chemical calculations for A level AS/A2/IB courses * EMAIL query?comment or request for type of GCSE calculation? |
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When elements and compounds react to form new products, mass cannot be lost or gained - "The Law of Conservation of Mass" - states that mass cannot be created or destroyed, but changed into different forms, so in a chemical change the total mass of reactants must equal the total mass of products. By using this law, together with atomic and formula masses, you can calculate the quantities of reactants and products involved in a reaction and the simplest formula of a compound (see also Ex 5. shows how to get to a compound's formula). NOTE: (1) the symbol equation must be correctly balanced to get the right answer! (2) There are good reasons why, when doing a real chemical preparation-reaction to make a substance you will not get 100% of what you theoretically calculate. See discussion in section 14.2
Self-assessment Quizzes [com] type in answer
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