Juan wants to find out what the crystal structure of a salt grain looks like. what tool should he use in his investigation?

Hand lens

Explanation:

Hand lens are used to observe very small particles. The lens are made of pieces of glass and plastic. It is also used by entomologists, horticulturist.

the question isn't complete here so i can't right an answer '_'

1. b.

2. d.

3. a.

5. d.

6. c.

these are the only ones that i know, i hope this , and good luck.