A student models steps in the process of how some sedimentary rocks form. First, she pours pebbles, leaves, sand, and salt into a jar. Then, she adds water to the jar until all of the contents are covered. What should the student do to her model next?

The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

What causes most sediment to wash or fall into a river