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Chem - topic 3 - quantative

Quiz by Aryanna Chris

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61 questions
Show answers
  • Q1
    The 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
  • Q2
    Relative formula of desired products / relative formula mass of all reactants * 100
    What is the formula of atom economy
    30s
  • Q3
    Let'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 do
    30s
  • Q4
    Concentration (g/dm3) = mass of solute (g) / volume of solvent (dm3)
    What is the formula for finding the concentration of a solution
    30s
  • Q5
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    Concentration (mol/dm3) = number of moles (mol) / volume of solvent (dm3)
    30s
  • Q6
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    1dm3 = 1000cm, so divide it. 500cm3 / 1000= 0.5 dm3
    30s
  • Q7
    Atomic mass * number of atoms of that element / mr of the compound * 100
    What is the equation of a percentage mass of an element in a compound
    30s
  • Q8
    Volume of gas (dm3)= mass of gas (g) /mr of gas * 24
    What is the equation of finding volume of gas?
    30s
  • Q9
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    Example: Calculate the volume of 319.5 g of chlorine
    30s
  • Q10
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    Volume = 319.5/71 * 24 = 108dm3
    30s
  • Q11
    Add all the relative formula mass
    How do you find the Mr of a compound
    30s
  • Q12
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    Example MaCl2
    30s
  • Q13
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    Ar of Mg = 24 Ar of Cl= 35.5
    30s
  • Q14
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    24+35.5 = 95
    30s
  • Q15
    The 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 substance
    What is a mole?
    30s

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