Zinc (Zn) reacts with hydrochloric acid (HCI) and produces hydrogen gas. This is an example of:
A. A new substance is formed
B. A change in composition at the atomic level.
C. All of these
D. A chemical change.
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Some molecular compounds, such as hcl, ionize completely in solution. for molecular compounds such as h2co3, most molecules do not ionize in solution. which describes the properties of these two solutes? a. hcl and h2co3 have the same effect on the properties of the solution. b. hcl raises the freezing point of water more than h2co3 does. c. hcl raises the boiling point of water more than h2co3 does.