Isabella filled a glass with warm water. She measured the temperature, and it was 30�c. She left the glass on a table in a room that was 20�c. A few hours later, she measured the water temperature again, and it was 24�c. Which best explains why the water temperature changed?.

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?