Chemistry Basics: Formulas, Reactions, and Processes
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Questions and Answers

What is the primary requirement for a successful collision in a chemical reaction?

  • Reactants must collide with only high energy
  • Reactants must collide with sufficient energy and proper orientation (correct)
  • Reactants must collide with low energy
  • Reactants must collide with low pressure

    • What is the result of ineffective collisions between reactants?

  • Reactants change color
  • Reactants change shape
  • Reactants are not transformed into products (correct)
  • Reactants are transformed into products

    • How does an increase in temperature affect the rate of a chemical reaction?

  • It slows down the reaction
  • It stops the reaction
  • It speeds up the reaction (correct)
  • It has no effect on the reaction

    • What is the purpose of food additives designated with E numbers?

    <p>To preserve, add flavor, or improve the appearance of food</p> Signup and view all the answers

    What is the process by which light energy is converted into chemical energy?

    <p>Photosynthesis</p> Signup and view all the answers

    What is the term for the small number in a chemical formula that represents the number of atoms of a particular element in a compound?

    <p>Subscript</p> Signup and view all the answers

    What is the relationship between pressure and volume at constant temperature and amount of gas?

    <p>Pressure increases as volume decreases</p> Signup and view all the answers

    What is the result of decreasing the volume of a gas at constant temperature?

    <p>The pressure increases</p> Signup and view all the answers

    What is the category of biomolecules that includes carbohydrates?

    <p>None of the above</p> Signup and view all the answers

    What is the term for a group of atoms joined together by a chemical bond?

    <p>Molecule</p> Signup and view all the answers

    What is the term for a small molecule that combines to form a larger molecule?

    <p>Monomer</p> Signup and view all the answers

    Who is the scientist who investigated the relationship between pressure and volume at constant temperature and amount of gas?

    <p>Robert Boyle</p> Signup and view all the answers

    What is the effect of increasing the concentration of reactants on the rate of reaction?

    <p>It increases the chances of successful collisions between particles.</p> Signup and view all the answers

    What is the purpose of a catalyst in a chemical reaction?

    <p>To lower the activation energy needed for the reaction.</p> Signup and view all the answers

    What is the effect of decreasing the particle size of reactants on the rate of reaction?

    <p>It increases the frequency of collisions between particles.</p> Signup and view all the answers

    What is the chemical equation for the rusting of iron?

    <p>4Fe + 3O2 + 6H2O → 4Fe(OH)3</p> Signup and view all the answers

    What is the term for the process by which certain materials deteriorate due to oxidation?

    <p>Corrosion</p> Signup and view all the answers

    What is the role of enzymes in the human body?

    <p>To act as catalysts for different chemical reactions.</p> Signup and view all the answers

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