Chemistry Flashcards up to Dilution 0.0 / 5 ? ChemistryCalculationsASOCR Created by: paddy01Created on: 09-11-17 09:24 What is the equation for Relative Atomic Mass? a% x Ma + b% x Mb + c% x Mc 1 of 15 What equation is used when a question is asking to find the number of molecules, ions or atoms? Number of moles (mol) = number of formula units/Avogadro Constant 2 of 15 What is Relative Atomic Mass? Relative atomic mass is the weighted mass of an atom of an element relative to 1/12th of the mass of an atom of Carbon-12 3 of 15 What is Relative Isotopic Mass? Relative isotopic mass is the mass of an isotope relative to 1/12th of the mass of an atom of Carbon -12 4 of 15 What is Molar Volume? The Molar Volume of a substance (at certain conditions) is the volume occupied by one mole of the substance in Cm3 mol-1 5 of 15 What is the equation for number of moles of a gas? No. of moles of a gas = Volume of gas/ Molar volume of gas (24.0dm3 mol-1) 6 of 15 What is Boyle's law? For a gas with a fixed mass and temperature, its pressure is inversely proportional to its volume. 7 of 15 What is the Pressure law? For a gas with a fixed mass and volume, its pressure is directly proportional to its kelvin temperature (K) 8 of 15 The ideal gas equation is pV = nRT, what does each symbol represent? R always has a value of 8.314Jmol-1 K-1, T is temperature (K), V is volume (m3) and n is the amount of gas molecules (mol) 9 of 15 When a metal and oxide react, what are the products? Salt + Water 10 of 15 When an acid reacts with a carbonate, what are the products? Salt + Carbon Dioxide + Water 11 of 15 When an acid and hydrocarbonate react, what are the products? Salt + Carbon Dioxide + Water 12 of 15 What equations are used to work out concentration? Concentration ( gdm-3) = mass of solute (g) / Volume of solution (dm3) and Concentration (gdm-3) = molarity (moldm-3) X molar mass (gmol-1) 13 of 15 What is the equation for molarity? Molarity (moldm-3) or M = no.of moles of solute (mol) / Voume of solution (dm3) 14 of 15 What equation would be used to work out the molarity or volume of a solution before or after dilution? M1 V1 = M2 V2 15 of 15
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