Chemistry, 19.10.2019 17:00 knikni06

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

Answers: 2

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