The pH of a solution in which [OH-] = 3.4 x 10-5 M is?

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

What reaction is taking place? 02 + c3h8 = h20 + co2