Question

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

**MY answer: B
is that right??

Answer 1

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
***My answer: D

Answer 2

are those correct?? are my answers B for problem 1, and D for #2???

Answer 3

B

Answer 4

so my first one was correct?? it is B?? what about #2??

Answer 5

yes

Answer 6

yay!! and is #2 correct?? its D?

Answer 7

yes

Answer 8

thanks! :)