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Balancing equations

Quiz by Oak National Academy: GCSE Chemistry OCR Higher

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6 questions
Show answers
  • Q1
    What does a chemical formula like Na₂O represent?
    physical state of a substance
    number and ratio of each element in a substance
    chemical name of a substance
    30s
  • Q2
    Match the terms to the correct definitions.
    Users link answers
    Linking
    30s
  • Q3
    Starting with identifying the reactants and products chemical formulae, sort the steps to describe how to balance an equation.
    Users link answers
    Linking
    30s
  • Q4
    A coefficient is the number placed in front of a chemical formula to balance an equation; it ______ all the atoms in the formula and shows the ratio of substances in a reaction.
    Users enter free text
    Type an Answer
    30s
  • Q5
    Determine which reactions are balanced.
    Users sort answers between categories
    Sorting
    30s
  • Q6
    Select the correct balanced equation for when propane (C₃H₈) completely combusts to form carbon dioxide and steam.
    C₃H₈ (g) + 5O₂ (g) -> 3CO₂ (g) + 4H₂O (l)
    2C₃H₈ (g) + 7O₂ (g) -> 6CO (g) + 8H₂O (g)
    C₃H₈ (g) + 5O₂ (g) -> 3CO₂ (g) + 4H₂O (g)
    C₃H₈ (g) + 2O₂ (g) -> 3CO₂ (g) + 4H₂O (g)
    C₃H₈ (g) + O₂ (g) -> CO₂ (g) + H₂O (g)
    30s

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