If the temperature changes in a chemical reaction, what has occured?

A) energy was destroyed

B) energy was created

C) there was no energy transfer

D) energy was transferred

Which of the following solutions is a good buffer system? Which of the following solutions is a good buffer system? a solution that is 0.10 M HF and 0.10 M LiC2H3O2 a solution that is 0.10 M HC2H3O2 and 0.10 M LiC2H3O2 a solution that is 0.

Describe an indicator

Which of the following is true of gases? Gases are not easily compressed because of expansion and limited space between particles. Gases mix easily because of their high kinetic energy and low intermolecular forces.

A model to show where water flows during a storm?

Which of the following reagents convert (s) benzoyl chloride to phenyl propyl ketone? a. CH3CH2CH2MgBr b. CH3CH2CH2Li c. (CH3CH2CH2) 2CuLi d. both A and B e. both A and C

How many valence electrons are in atom of sulfur?

My sister needs this answered! Donald is creating an experiment to determine if fertilizer affects plant color. He makes this statement: "If each plant receives a different amount of fertilizer, then the plant's color intensity will change.

What would happen to life if earth were in a different location within the solar system

Substance that undergoes a change in a chemical reaction is a. a product c. a reactant. b. a chemical. d. an enzyme.

List the number of protons, neutrons, and electrons in Iodine-127. (atomic number is 53)