Chemistry 4.3 - Quantitative Chemistry 0.0 / 5 ? ChemistryCalculations, moles and yieldGCSEAll boards Created by: MaxR1Created on: 19-05-18 15:11 What is the conservation of mass? The idea that in a chemical reaction, the total mass of products = total mass of reactants, as no atoms are lost or made. 1 of 9 What is relative formula mass? The sum of the relative atomic masses of all the atoms in the numbers shown in the formula. 2 of 9 What is the relative formula mass of Carbon Dioxide? Carbon = (12 x 1) Oxygen x 2 = (16 x 2) (12 x 1) + (16 x 2) = 44 3 of 9 Why must a symbol equation balance? As no atoms are lost or made in a reaction 4 of 9 How many particles are in a mole? 6.02 x 10^23 5 of 9 How many grams in 1 mole of sodium? The relative atomic mass of Sodium is 23. Therefore 23g 6 of 9 What is the equation for moles? Mass of substance = Atomic mass x Moles (Mass = Mr x Moles) 7 of 9 Calculate the mass of aluminium oxide needed to make 540g of Aluminium *** Insert *** 8 of 9 What is a limiting reactant? Sometimes when 2 chemicals react together, one chemical is completely used up, and stops the reaction from going any further 9 of 9
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