- Describe the law of conservation of mass. How do you know if a chemical equation is in accord with this law?
- A deep lake in Minnesota is covered with ice. What is the water temperature at the bottom of the lake? Explain your reasoning.
- Describe at least four different examples of how you could make hard water soft.
- What is the difference between high-octane and regular gasoline? Many people feel that they will get better performance by using a higher-octane gasoline in their vehicles. Does scientific evidence bear this out?
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