When you add ammonia to a solution it is important to remember that you change the concentration of the hydroxide ions present because of the reaction: nh4 (aq) + oh (aq) nh3(ac) + h2o0 remembering this will you with at least two of the steps in this exercise. in many metal-containing solutions, the addition of ammonia causes a hydroxide precipitate to form. select the statement below which best describes this observation. select one: a. the addition of nh3 causes the ph to increase thus increasing the [oh]. x b. the addition of nh3 causes the ph to decrease thus increasing the [oh]. c. the addition of nh3 results in a reaction between ammonia and oh, causing the ph to increase. d. the addition of nh3 results in a reaction between ammonia and water, causing [oh] to increase.

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance