Chemical Formulas and John Dalton's Laws Quiz
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Questions and Answers

What did John Dalton propose in the early nineteenth century?

  • Atoms of a given element have different masses and chemical properties.
  • Atoms don't have defined mass or chemical properties.
  • Atoms of different elements are identical in mass and chemical properties.
  • Atoms of a given element are identical in mass and chemical properties. (correct)
  • Which particle has a positive electrical charge and a mass similar to that of a Hydrogen atom?

  • Isotope
  • Electron
  • Proton (correct)
  • Neutron
  • What is the smallest particle of an element?

  • Molecule
  • Neutron
  • Atom (correct)
  • Proton
  • What is the atomic number defined as?

    <p>Number of protons in the nucleus (B)</p> Signup and view all the answers

    What are isotopes?

    <p>Atoms with the same atomic number but different mass numbers (A)</p> Signup and view all the answers

    What holds the constituent atoms together in polyatomic molecules?

    <p>Chemical bonds (C)</p> Signup and view all the answers

    Which type of substances do not consist of ions and do not conduct electricity?

    <p>Nonelectrolytes (D)</p> Signup and view all the answers

    How are formulas of substances written to denote the number of atoms of an element in the substance?

    <p>With numerical subscripts after each symbol (B)</p> Signup and view all the answers

    What is the charge on the ammonium ion (NH4+)?

    <p>+1 (A)</p> Signup and view all the answers

    In the compound CaO, what does 'O' stand for?

    <p>Oxygen (D)</p> Signup and view all the answers

    What does molarity (M) measure in a solution?

    <p>Number of moles of solute in 1 liter of solution (D)</p> Signup and view all the answers

    How is normality (N) defined in a solution?

    <p>Number of equivalents of solute in 1 L of solution (D)</p> Signup and view all the answers

    What does weight percent express in terms of concentration?

    <p>% weight of solute per 100 g of solution (A)</p> Signup and view all the answers

    In a 5% (v/v) aqueous solution, what does 'v/v' represent?

    <p>% volume to volume ratio (C)</p> Signup and view all the answers

    What does 'ppm' stand for in expressing concentration?

    <p>% parts per million (B)</p> Signup and view all the answers

    'Parts per million' is equivalent to how many mg/L for dilute aqueous solutions with a density of approximately 1.00 g/mL?

    <p>$0.01 mg/L$ (D)</p> Signup and view all the answers

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