Quantitative Chemistry 5.0 / 5 based on 2 ratings ? ChemistryAtoms and compoundsGCSEAQA Created by: aejacksonCreated on: 26-02-20 19:48 What is RELATIVE FORMULA MASS? All realtive atomic masses of atoms in a molecular formula added together. 1 of 26 What is the symbol for RELATIVE FORMULA MASS? Mr 2 of 26 What is the symbol for RELATIVE ATOMIC MASS? Ar 3 of 26 Where can you find the RELATIVE ATOMIC MASS/S The periodic table 4 of 26 What is the MOLE? The amount of a substance 5 of 26 What is AVOGADRO'S CONSTANT? 6.02 * 10 ^23 6 of 26 What is the calculation linking MASS, MOLES + FORMULA MASS? No. of moles = mass / formula mass 7 of 26 How do you calculate the number of MOLES? mass / formula mass 8 of 26 How do you calculate MASS? no. of moles * formula mass 9 of 26 How do you calculate FORMULA MASS? mass / no. of moles 10 of 26 For: MOLES = MASS / FORMULA MASS, what is MASS measured in? Grams (g) 11 of 26 What does the CONSERVATION OF MASS mean? No atoms are created or destroyed during a reaction. 12 of 26 Why does the CONSERVATION OF MASS LAW sometimes not work? A gas escapes or joins the reaction, increasing or decreasing mass 13 of 26 What can you do with REACTING MASSES? Balance equations 14 of 26 What is a LIMITING REACTANT? A reactant that is used up in a reaction 15 of 26 Why are there LIMITING REACTANTS? To use up an expensive reactant 16 of 26 What is a PRODUCT that is IN EXCESS? Products left at the end of the reation 17 of 26 What is the purpose of a PRODUCT being IN EXCESS? To make sure an expensive reactant is used up 18 of 26 What is CONCENTRATION? A measure of the density of a solution 19 of 26 What is the formula linking CONCENTRATION, MASS OF SOLUTE + VOLUMES OF SOLVENT? Concentration = mass of solute / volume of solvent 20 of 26 How do you calculate CONCENTRATION? mass / volume 21 of 26 How do you calculate MASS OF SOLUTE? concentration * volume 22 of 26 How do you calculate VOLUME OF SOLVENT? mass / concentration 23 of 26 What are the units for CONCENTRATION? g/dm ^3 24 of 26 What are the units for mass of solute? grams (g) 25 of 26 What are the units for VOLUME OF SOLVENT? dm ^3 26 of 26

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