Amixture consisting of 30 ml of waste and 270 ml of seeded dilution waster has an initial do of 8.55 mg/l; after five days, it has a final do of 2.40 mg/l. another bottle containing just the seeded dilution water has an initial do of 8.75 mg/l and a final do of 8.53 mg/l. find the five-day bod of the waste.

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.

The equilibrium constant kc for the reaction 2 nocl(g) → 2 no(g) + cl2(g) is 0.453 at a certain temperature. a mixture of nocl, no, and cl2 with concentrations 1.30, 1.20, and 0.600 m, respectively, was introduced into a container at this temperature. which of the following is true? 1. no apparent reaction takes place. 2. [cl2] = 0.30 m at equilibrium. 3. nocl(g) is produced until equilibrium is reached. 4. [nocl] = [no] = [cl2] at equilibrium. 5. cl2(g) is produced until equilibrium is

2. a sample of table sugar (sucrose, c12h22o11) has a mass of 1.202 g. a. calculate the number of moles of c12h22o11 contained in the sample. show your work. b. calculate the moles of each element in c12h22o11, show your work c. calculate the number of atoms of each type in c12h22o11. show your work