A pH of 3 is how many times more acidic than a pH of 6?

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.