Which of the following is an example of a chemical reaction? A. breaking a glass
B. dissolving salt into water
C. freezing water
D. lighting a match

What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen, and 48.68% fluorine? the molar mass of the compound is 156.12 g/mol

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?