1. water is easily contaminated by both biological and chemical contaminants. define and give 3 examples of each
2. what happens when you mix an acid and a base
3. how does ppm compare to ppb
4. how are coagulation and filtration used to clean water
5. dante adds a small amount of sugar to a cup of warm water. after a period of time, the sugar is no longer visible. what happened to the sugar?

d.) circle motion requires a force to give it a centripetal acceleration.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.