Can you help me with this question

What is the molar mass of potassium nitrate, kno3

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~

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 ?