9. A change in color when two solutions are mixed together is a clue that a

__has taken place.

A. chemical change

B. physical change

C. temperature change

D. change in state

Mr. and Mrs. Hernandez are building a new house in the desert. They want to generate heat for the house with renewable energy. What resource should they use? Coal Fuel oil natural gas solar power

Which statement best explains why heating a liquid affects its viscosity? 1.) The molecules move faster at higher temperatures and overcome attractions more easily. 2.

When did homo spiens leave africa

How many milliliters of 0.15 M solution could you prepare?

Which element has properties most similar to Bromine? A) F B) Kr C) S D) Se

Consider two solutions, solution a and solution b. [h+] in solution a is 370 times greater than that in solution b. part a what is the difference in the ph values of the two solutions?

All of the following are possible sources of error in a scientific investigation except for O measuring materials such as mass and volume incorrectly. o recording experimental data incorrectly. o having a constant in your experiment.

Do polyatomic ions have fixed charges?

Which type of organism is used to make bread rise when baking? A. plants B. protists C. yeast D. bacteria

How many particles are in 3.55 moles of Aluminum Sulfate