Which two conditions explain why special technology is required to study the deepest parts of the ocean? A. Uneven terrain on the ocean floor B. extremely high pressure C. thickness of ice on the ocean floor D. unusually high oxygen levels

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

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 is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2