Which is the correct formula for phosphorus pentachloride? pcl4 because a subscript of 4 indicates four cl atoms pcl5 because a subscript of 5 indicates five cl atoms p5cl because a subscript of 5 indicates five p atoms p5cl3 because a subscript of 5 indicates five p atoms

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 ?