What is the pH of an aqueous solution with a hydrogen ion concentration of [H+]=8.2×10 −7 M?

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?