Problem 1: For which of the following activities might you want to hire a chemist?
A. building a garage
B. testing a sample of water from a well
C. finding a comet
D. examining the structure of plant cells
Problem 2: Which of the following procedures involves a physical change in one of the substances?
A. creating salt by reacting sodium metal and chlorine gas
B. allowing a nail to rust
C. building a model rocket propelled by mixing baking soda and vinegar
D. grinding chalk into a fine powder
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Home » Chemistry » Problem 1: For which of the following activities might you want to hire a chemist? A. building a garage B. testing a sample of water from a well C. finding a comet D.