50.0 grams of a pure gaseous compound was found to contain 25 grams of oxygen. What is the percentage by weight of oxygen in this compound? Answer in units of %

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

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 ?

Which element is least likely to undergo a chemical reaction