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The number of oxygen atoms in a molecule of aluminum sulfate, Al2SO4) 3, is
Q8: Of the substances below, the one with
Q11: The properties of several different materials are
Q17: The Andes are the result of<br>A) an
Q18: Ionic compounds in the solid state<br>A) always
Q18: Auroras consist of<br>A) colored clouds.<br>B) comet tails.<br>C)
Q28: Which of the following statements is correct?<br>A)
Q31: Ionic crystals dissolve only in liquids that
Q32: Known elements have atomic numbers up to<br>A)
Q34: A 400-kg concrete block is 1 m
Q34: The 2.5-kg head of an ax exerts