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Relative formula mass

Quiz by Oak National Academy: GCSE Chemistry Edexcel Foundation

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6 questions
Show answers
  • Q1
    What does the relative atomic mass (RAM or Ar) compare the mean mass of an atom to?
    the mass of a proton
    the mass of an electron
    1/12 of the mass of an oxygen-16 atom
    1/12 of the mass of a carbon-12 atom
    30s
  • Q2
    Order the following steps to calculate the RFM of a compound correctly. Start withe periodic table.
    Users link answers
    Linking
    30s
  • Q3
    What is the relative formula mass (RFM or Mr) of water (H₂O)?
    18
    16
    19
    17
    20
    30s
  • Q4
    Calculate the RFM of carbon dioxide (CO₂)
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    Type an Answer
    30s
  • Q5
    To calculate the percentage by mass of an element in a compound, you need:
    the atomic number of the element
    the RFM of the compound and the RAM of the element
    the total number of electrons in the compound
    the number of protons in the element
    30s
  • Q6
    What is the percentage by mass of hydrogen in water (H₂O)? Give your answer to four significant figures.
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    Type an Answer
    30s

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