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A certain calorimeter absorbs 65 J/o

C. If 55.0 g of 67o

C water is mixed with the

calorimeter’s original 50.0 g of 23o

C water. Calculate for the final temperature of the

mixture?

. Show the hydrolysis of ADP to AMP. Include in the reaction the amount of energy produced.

Classify the following into elements, mixture and compound.

Soap,

water,

blood,

urine,

urea,

antimony,

vanadium and

limestone

A certain calorimeter absorbs 65 J/oC. If 55.0 g of 67oC water is mixed with the calorimeter’s original 50.0 g of 23oC water. Calculate for the final temperature of the mixture?

1. Incoming wastewater, with BOD5 equal to about 200 mg/L is treated in a well-run secondary treatment plant

that removes 90% of the BOD. You are to run a 5-day BOD test with a standard 300 mL bottle, using a mixture

of treated sewage and the dilution water (no seed). Assuming that the initial DO is 9.2 mg/L,

a. Roughly, what maximum volume of treated wastewater should you put in the bottle is you want to have at

least 2 mg/L at the end of the test (filling the rest of the bottle with water)?

b. If you make a mixture of half water and half treated wastewater, what DO would you expect after 5 days?

2. A mixture consisting of 30 mL of waste and 270 mL of seeded dilution water has an initial DO of 8.55 mg/L;

after 5 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 5-day BOD of the waste.