Hydrochloric acid ( 75.0 mL, 0.250M ) is added to 225.0mL of 0.050 M barium hydroxide. What is the concentration of excess H or OH-

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.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.