Is smelting copper is a chemical change or physical change?

What would be the best technique to separate an insoluble solid from an liquid, like sand from water

Which is a property of a mineral a. density b. age c. size d. odor

Which of the following phase changes only occurs in solids possessing vapor pressures above atmospheric pressure and at ambient temperature? Condensation Melting Sublimation Deposition

What device changes mechanical energy into electrical energy? Question 4 options: transformer generator copper wire light switch

Why is earth's interior layered?

C12 has 6 protons. how many neutrons does c13 have? a. 6 b. 7 c. 13 d. 19

Imagine you are at a local water park on a hot summer day and your feet begin to get hot from the cement. Looking ahead, you notice that there are two paths you can take to your favorite waterslide.

Determine the pH of a 0.350 M solution of HA. The pkb of A - is 12.830.

Which statement is true about oxygen-17 and oxygen-18?

A man is making chicken noodle soup and has found it to be too salty. What method could he use to make the soup less salty? a. Add equal measured amounts of water to the soup. b. Bring the soup to a boil so that some of the broth evaporates. c.