Question 1: Is it always possible to recycle and reuse materials?
a) Yes, because atoms cannot be destroyed in a chemical reaction.
b) Yes, because atoms can only be rearranged in a chemical reaction.
c) No, because atoms can be changed into other kinds of atoms.
d) No, because the atoms may be spread so thinly that it would take too much time, energy and money to collect them and bring them back together.
Question 2: Which one of the following statements is an incorrect statement of the Law of Conservation of Mass?
a) The mass of a system is dependent upon chemical reactions that may occur.
b) The mass of a system is conserved in a chemical reaction.
c) Matter cannot be created or destroyed.
d){ Atoms are conserved in chemical reactions.
Question 3: When a gaseous sample experiences an increase in temperature, which of the following is a correct description of what will occur?
a) The volume of the sample will increase.
b) The mass of the sample will remain constant.
c) The density of the sample will decrease.
d) All of the above will occur.
e) None of the above will occur.
Question 4: The known density of a specific type of steel is 8.10 g/cm3. What is the mass of a 1.26 L volume of this type of steel?
a) 10,206 g
b) 10.206 g
c) 102.06 g
d) None of these
Question 5: Considering the location of gallium on the periodic table, which is the best description of this element?
a) A main group element which is nonmetallic and has 3 valence electrons.
b) A transition element which is metallic and has 3 valence electrons.
c) A main group element which is metallic and has 3 valence electrons
d) A transition element which is metallic and has 4 valence electrons.
e) None of these are accurate descriptions.
