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Unit 2 evaluation Molecules, compounds, stoichiometry

Quiz by Jaime

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94 questions
Show answers
  • Q1
    When elements combine to form compounds, their properties only change slightly. True or False?.
    False
    True
    30s
  • Q2
    The properties of a compound are an average of the properties of the individual elements. True or False?
    False
    True
    30s
  • Q3
    Life could not exist with just 91 elements if they did not combine to form compounds. True or False?
    False
    True
    30s
  • Q4
    Although some substances we encounter in our routine lives are elements, most occur in the combined state. True or False?
    True
    False
    30s
  • Q5
    The law of constant composition states: All samples of a given compound have the same proportions of their constituent elements. True or False?
    False
    True
    30s
  • Q6
    The law of constant composition states: All samples of a given compound have the same proportions of their constituent elements. True or False?
    True
    False
    30s
  • Q7
    The ratio in a chemical formula is a ratio of atoms, not a ratio of masses. True or False?
    True
    False
    30s
  • Q8
    The subscripts in a chemical formula represent the relative mass of each atom in a chemical compound. True or False?
    True
    False
    30s
  • Q9
    The subscripts in a chemical formula do not change for a given compound. True or False?
    True
    False
    30s
  • Q10
    Chemical formulas normally list the most metallic elements first. True or False?
    True
    False
    30s
  • Q11
    The formula of a compound comprised of two nitrogen atoms and one oxygen atom should be written properly as ON2. True or False?
    False
    True
    30s
  • Q12
    Molecular elements do not exist in nature. True or False
    False
    True
    30s
  • Q13
    The element nitrogen normally exists in nature as a diatomic molecule. True or False?
    False
    True
    30s
  • Q14
    If a chemical reaction produces the molecular element oxygen, the formula of oxygen should be written as O2 . True or False?
    False
    True
    30s
  • Q15
    Carbon dioxide is an example of a molecular compound. True or False?
    True
    False
    30s

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