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Chem - topic 3 - quantative
Quiz by Aryanna Chris
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61 questions
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- Q1The atom economy of a reaction tells you how much of the mass of the reactants is wasted when manufacturing a chemical and how much ends up as a useful product.What is atom economy?30s
- Q2Relative formula of desired products / relative formula mass of all reactants * 100What is the formula of atom economy30s
- Q3Let's you find the volumes needed for two solutions to react together. If you know the concentration of one of the equations you can use the volumes to find the other.What do titrations do30s
- Q4Concentration (g/dm3) = mass of solute (g) / volume of solvent (dm3)What is the formula for finding the concentration of a solution30s
- Q5See imageConcentration (mol/dm3) = number of moles (mol) / volume of solvent (dm3)30s
- Q6See image1dm3 = 1000cm, so divide it. 500cm3 / 1000= 0.5 dm330s
- Q7Atomic mass * number of atoms of that element / mr of the compound * 100What is the equation of a percentage mass of an element in a compound30s
- Q8Volume of gas (dm3)= mass of gas (g) /mr of gas * 24What is the equation of finding volume of gas?30s
- Q9See imageExample: Calculate the volume of 319.5 g of chlorine30s
- Q10See imageVolume = 319.5/71 * 24 = 108dm330s
- Q11Add all the relative formula massHow do you find the Mr of a compound30s
- Q12See imageExample MaCl230s
- Q13See imageAr of Mg = 24 Ar of Cl= 35.530s
- Q14See image24+35.5 = 9530s
- Q15The name given to an amount of substance. The mole of atoms or molecules of any substance will have a mass in grams equal to the relative formula mass for that substanceWhat is a mole?30s