Chemical Reactions and Laws of Chemical Combination Quiz
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Questions and Answers

What are the molecules that interact to produce new compounds in a chemical reaction called?

  • Protons
  • Neutrons
  • Isotopes
  • Reactants (correct)
  • Which law states that matter can neither be created nor destroyed in a chemical reaction?

  • Law of Conservation of Energy
  • Law of Constant Velocity
  • Law of Conservation of Mass (correct)
  • Law of Inertia
  • What is another name for the 'Law of Constant Proportions'?

  • Dalton's Law
  • Boyle's Law
  • Proust’s Law (correct)
  • Avogadro's Law
  • In a chemical reaction, what remains conserved according to the law of conservation of mass?

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

    What is the defining structure of an element that cannot be broken by any chemical means?

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

    According to Dalton's Atomic Theory, what are atoms described as?

    <p>Solid, massy, hard, impenetrable, moving particles</p> Signup and view all the answers

    What does the atomic radius represent?

    <p>Distance between an atom's nucleus and outer electron shell</p> Signup and view all the answers

    What is the mass number of an element equal to?

    <p>Total number of protons and neutrons</p> Signup and view all the answers

    What is atomic mass commonly expressed in terms of?

    <p>Unified Atomic Mass Unit (AMU)</p> Signup and view all the answers

    How is molecular mass calculated?

    <p>By multiplying atomic mass by the number of atoms in the molecule and then adding the masses of all elements present</p> Signup and view all the answers

    Study Notes

    Chemical Reaction Concepts

    • Molecules that interact to produce new compounds in a chemical reaction are called reactants.
    • The Law of Conservation of Mass states that matter can neither be created nor destroyed during a chemical reaction.
    • The Law of Constant Proportions is also known as the Proust's Law.

    Conservation and Structure in Chemistry

    • According to the law of conservation of mass, mass remains conserved; the total mass of reactants equals the total mass of products in a chemical reaction.
    • The defining structure of an element that cannot be broken down by any chemical means is an atom.

    Dalton's Atomic Theory and Atomic Properties

    • According to Dalton's Atomic Theory, atoms are described as indivisible particles that combine in whole-number ratios to form compounds.
    • The atomic radius represents the distance from the nucleus of an atom to the outermost electrons, indicating the size of the atom.

    Mass and Molecular Calculations

    • The mass number of an element is equal to the total number of protons and neutrons in its nucleus.
    • Atomic mass is commonly expressed in terms of atomic mass units (amu).
    • Molecular mass is calculated by summing the atomic masses of all atoms present in a molecular formula.

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    Description

    Test your knowledge on chemical reactions and the laws of chemical combination with this quiz. Explore concepts like reactants, products, conservation of mass, and more.

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