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9 Elite T3 Exam Revision

Quiz by Alix

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29 questions
Show answers
  • Q1
    What is Avogadro's Number
    6.20x10³
    6.02x10²³
    -6.02x10²³
    6.02-10²³
    30s
  • Q2
    If you have been given the number of moles but you want to work out the number of particles you have to...
    subtract Avogadro's number
    divide by Avogadro's number
    add Avogadro's number
    multiply by Avogadro's number
    30s
  • Q3
    Calculate the number of particles in 1 mole of CO
    6.02x10-²³
    12.04 x10²³
    6.02 x10²³
    3.01 x10²³
    30s
  • Q4
    What is molar mass?
    The mass of a particle in a mole
    How many molecules are together in a mole
    How many atoms are in one mole. Sometimes seen as Mm
    The mass of one mole of a substance. Sometimes seen as Mr
    30s
  • Q5
    Imagine we need 3 mol of copper (Cu) for a chemical reaction, how would you know the mass of copper to measure out? (Mr of Cu = 63.546)
    6.02 x10
    19.0 g
    191g
    0.0472g
    30s
  • Q6
    How many moles of fluorine atoms are in 4 moles of Dichlorodifluoromethane (CCl₂F₂)?
    6
    4
    8
    2
    30s
  • Q7
    How many moles of Oxygen would we have in 5.5 moles of CuSO₄?
    1
    11
    4
    22
    30s
  • Q8
    What is the molar mass of NaCl? (Mr of Na = 22.99, Mr of Cl = 35.45)
    55.44 g/mol
    23 g/mol
    58.44g/mol
    59 g/mol
    30s
  • Q9
    Calculate the mass of 3.5 mol of CCl₂F₂. (Mr of CCl₂F₂ = 120.907g/mol)
    423.175 g
    423
    3.5 g
    0.0289 g
    30s
  • Q10
    How do you work out moles of a substance from the mass and molar mass?
    Moles = Mass x Mr x 100
    Moles = Mass/Mm
    Moles = Mass/Mr
    Moles = Mass x Mr
    30s
  • Q11
    Define Empirical formula
    A chemical formula of compound with the largest whole number ratio of atoms of each element in the compound.
    A chemical formula of compound with the simplest whole number ratio of atoms of each element in the compound.
    A chemical formula of compound with an even number of elements in a compound
    30s
  • Q12
    How do you calculate percentage by mass?
    (mass of element / mass of compound) x 100
    (mass of element / mass of compound) /100
    (mass of element x mass of compound) x 100
    30s
  • Q13
    If we have a compound ABC, it weights in total 200g. A weighs 50g, B weights 140g and C weights 10g. What are the percentages by mass of A,B and C?
    25%, 70% and 5%
    40%, 50% and 10%
    25%, 85% and 10%
    30s
  • Q14
    What is the empirical formula of H₂0
    H₂0₂
    2H₂O
    H₂0
    HO
    30s
  • Q15
    Name: CoCl₂ • 6H₂O
    Cobalt (II) chlorine hexahydrate
    Cobalt (II) chloride pentahydrate
    Cobalt (II) chloride hexahydrate
    30s

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