If an aqueous solution has a pH of 9.9, what is the concentration of the hydronium ion?

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Some familiar products contain some of the same types of atoms. for instance, the chemical formula for baking soda is nahco 3. the chemical formula for liquid bleach is naclo, and the chemical formula for table salt is nacl. which choice best describes why these three products have some of the same types of atoms in common?

Which of the following is true about the speed of light? it depends on the wavelength.