What type of process occurs when solidified wax is converted to liquid wax on heating?

endothermic

exothermic

decomposition

reversible

disintegration

The chemical formula H2O represents which of the following substances?

Black beach sand originates from broken down what?

What is an example of a solution found in a living system?

The cell theory states that all new cells come from other cells. How do unicellular organisms reproduce? How is it different from how multi-cellular organisms increase?

Two or more atoms joined together

What mass of potassium chlorate would contain 40grams of oxygen?

Identical forces act for the same length of time on two different masses. The change in momentum of the smaller mass is A) smaller than the change in momentum of the larger mass, but not zero. B) zero.

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)

A base can neutralize an acid. true or false

Hydrochloric acid (12.0 ml of 0.233 m) is added to 296.0 ml of 0.0579 m ba (oh) 2 solution. what is the concentration of the excess h + or oh - ions left in this solution?