What is the ph of a solution whose hydronium ion concentration is 5.03 10–1m

Calculate the number of moles of ethane in 100 grams

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

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 ?