Which pH has a [H+] twice as concentrated as that of a solution whose pH is 4.15?

Which one of the following gases is not an important component of soil?

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size