Chemical Reactions Lecture Quiz

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Questions and Answers

What is a chemical reaction?

  • The process by which atoms of one substance are rearranged to form the same substance
  • The process by which atoms of one substance are rearranged to form a different substance
  • The process by which atoms of multiple substances combine to form a single substance
  • The process by which atoms of one or more substances are rearranged to form new substances (correct)

What are some possible indications that a chemical reaction has occurred?

  • Color change, production of an odor, and plus signs used in equations
  • Absorption of heat, color change, and production of an odor (correct)
  • Release of energy in the form of light or heat, appearance of gas bubbles or a solid, and plus signs used in equations
  • Appearance of gas bubbles or a solid, absorption of heat, and release of energy in the form of light or heat

How are chemical reactions represented?

  • Using statements called equations to represent the reactants and products formed during the reaction (correct)
  • Using plus signs to separate the different reactants or products
  • Using arrows to separate the reactants and products formed during the reaction
  • Using numbers to indicate the quantity of each substance involved

What are some possible indications that a chemical reaction has occurred?

<p>Absorption of heat, color change, and production of an odor (C)</p> Signup and view all the answers

What is the purpose of using arrows in chemical equations?

<p>To indicate the direction from reactants to products (C)</p> Signup and view all the answers

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