Please help! Base your answer on the information below.
The health of fish depends on the amount of oxygen dissolved in the water. A dissolved
oxygen (DO) concentration between 6 parts per million and 8 parts per million is best for
fish health. A DO concentration greater than 1 part per million is necessary for fish
survival.
Fish health is also affected by water temperature and concentrations of dissolved
ammonia, hydrogen sulfide, chloride compounds, and nitrate compounds. Most
freshwater fish thrive in water with a pH between 6.5 and 8.5.
A student's fish tank contains fish, green plants, and 3800 grams of fish-tank water with
2.7 x 10-2 gram of dissolved oxygen. Phenolphthalein tests colorless and bromthymol
blue tests blue in samples of the fish-tank water.
State how an increase in the temperature of the fish-tank water affects the solubility of
oxygen in the water.

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