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Law of conservation of mass

Quiz by Haley Hunt

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10 questions
Show answers
  • Q1
    In a chemical reaction, if the mass of the products is greater than the mass of the reactants, what could this indicate?
    The products weigh more than the reactants by nature.
    Mass is being created from energy.
    There may be a mistake in measurements.
    A chemical reaction did not occur.
    30s
  • Q2
    What happens to the total mass if a closed system undergoes a physical change, such as ice melting into water?
    The total mass increases.
    The total mass becomes zero.
    The total mass remains the same.
    The total mass decreases.
    30s
  • Q3
    Which of the following best explains why chemical reactions can be predicted using the law of conservation of mass?
    Atoms are destroyed in the reaction.
    Atoms are rearranged, but their total amount remains the same.
    Atoms are created during the reaction.
    Atoms change into different elements.
    30s
  • Q4
    What is one way scientists can demonstrate the law of conservation of mass in a laboratory?
    By observing color changes
    By changing the pressure in the container
    By heating the substances
    By measuring the mass of all reactants and products before and after a reaction
    30s
  • Q5
    In a closed container where a reaction occurs, what does the law of conservation of mass tell us about the total mass of reactants and products?
    The mass of reactants is less than the mass of products.
    The mass of reactants varies depending on the reaction.
    The mass of reactants is more than the mass of products.
    The mass of reactants equals the mass of products.
    30s
  • Q6
    If 10 grams of hydrogen reacts with 80 grams of oxygen, what will be the total mass of the products formed?
    70 grams
    90 grams
    100 grams
    80 grams
    30s
  • Q7
    During a chemical reaction, what remains unchanged according to the law of conservation of mass?
    The total mass of the substances involved
    The temperature of the reactions
    The volume of the substances
    The color of the substances
    30s
  • Q8
    What is a practical application of the law of conservation of mass in everyday life?
    Balancing chemical equations in reactions
    Increasing mass in a closed system
    Creating energy from nothing
    Decreasing the mass of reactants
    30s
  • Q9
    Which of the following statements best describes the law of conservation of mass?
    The total mass before a reaction is equal to the total mass after the reaction.
    Mass can be destroyed during a reaction.
    Mass can change forms but is not conserved.
    Mass can be created during a reaction.
    30s
  • Q10
    According to the law of conservation of mass, what happens to the mass of a substance during a chemical reaction?
    The mass remains constant
    The mass increases
    Some mass is lost as energy
    The mass decreases
    30s

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