Give the coefficient of y in the following expression. 2xz² - 7xy + 4.​

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 ?

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2