What is true about water that is freezing?

a. the change cannot be undone.

b. it is going through a physical change.

c. it is going through a chemical change.

d. the chemical makeup of the water will not remain the same?

What components of an endothermic reaction have a higher heat content Reactants Products Reaction vessel Water

5. Which quantities must be conserved in all chemical reactions?

How does the average temperature change as the latitude decreases from the poles to the equator

A substance with a higher ability to ionize is better able to conduct electricity in a solution. given this information, strong bases would also be: a. strong electrolytes. c. nonelectrolytes. b. weak electrolytes. d. strong acids.

What type of reaction is shown below? Check all that apply. 2Mg+O2-> 2MgO

Which of the following is true of a person with a high credit score?

What is an example of making a qualified observation

With respect to composition, how is the compound made from hydrogen and oxygen different from mixtures of these two elements?

How should scientist respond when new evidence that challenges current is presented?

Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium pressure of H2. D2 (g) + H2 (g) ⇌ 2 HD (g) Kp = 1.80 P (D2) eq = 1.1 * 10-3 atm P (HD) eq = 2.7 * 10-3 atm