Chemistry Problems: Gas Mixtures and Partition Coefficients

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What is the given mass flux of ultimate BOD in kg · day⁻¹?

3.0 × 10² kg · day⁻¹
1.14 × 10⁵ kg · day⁻¹ (correct)
6.2 × 10³ kg · day⁻¹
114 kg · day⁻¹

What is the purpose of considering the stream deoxygenation rate in the Urcaguary wastewater problem?

To calculate the amount of ultimate carbonaceous BOD
To calculate the theoretical amount of oxygen consumed in the nitrification process
To determine the amount of ammonia nitrogen
To determine the DO level at a point 8.05 km downstream (correct)

What is the average linear velocity of water in the aquifer in m · s⁻¹?

2.650 × 10⁻⁶ m · s⁻¹
1.00e-07 m · s⁻¹
6.2 × 10⁻⁷ m · s⁻¹
2.650 × 10⁻⁷ m · s⁻¹ (correct)

What is the purpose of knowing the porosity of the aquifer in the given problem?

To calculate the average linear velocity of the pollutant (B) Signup and view all the answers

What is the given rate constant of Greatcrop in day⁻¹?

0.22 day⁻¹ (B) Signup and view all the answers

What is the assumption made regarding the lake's water sources in the Greatcrop problem?

The lake is fed only by the small pollution-free stream (D) Signup and view all the answers

What is the partial pressure of oxygen in a 22,414-L volume of air at STP?

21.224 kPa (C) Signup and view all the answers

What is the concentration of Spartan Green in the soil if the concentration in water is 105 g · L⁻¹?

1312.5 mg · kg⁻¹ (A) Signup and view all the answers

What is the average rate of infiltration in the Upper Grand watershed near Lansing, Michigan?

9.2 × 10⁻⁷ m · s⁻¹ (C) Signup and view all the answers

What is the partial pressure exerted by methane in a 28-L volume of gas at 300.0 K?

61.2 kPa (D) Signup and view all the answers

What is the evaporation rate estimated using the Dalton's equation?

4.0 × 10⁻⁵ m · s⁻¹ (D) Signup and view all the answers

What is the change in storage in the Upper Grand watershed near Lansing, Michigan?

0.36 (B) Signup and view all the answers

What is the amount of TCE removed from the bottom of the degreaser each week?

1.0% of the incoming TCE (A) Signup and view all the answers

What is the mass flow rate of the feed in the hazardous waste incinerator?

237.25 kg · min⁻¹ (A) Signup and view all the answers

What is the mean sound level from the given readings?

68.7 dB (C) Signup and view all the answers

What is the equivalent continuous equal energy level for the 40-min period?

84 dBA (A) Signup and view all the answers

What is the sound power level of the compressor?

124.5 dB (D) Signup and view all the answers

What is the SPL 200 m downwind on a clear summer afternoon?

not given enough information (D) Signup and view all the answers

What is the specific gravity of the grit particle in the horizontal grit chamber?

2.65 (B) Signup and view all the answers

What is the flow rate of the water treatment plant in cubic meters per second?

0.425 m³ · s⁻¹ (D) Signup and view all the answers

What is the length to width ratio of the primary settling tanks?

2:1 (C) Signup and view all the answers

What percentage of the ultimate BOD is the soluble BOD5?

68% (A) Signup and view all the answers

What is the theoretical amount of ferric chloride required to remove the soluble orthophosphate completely?

20.95 mg · L⁻¹ (D) Signup and view all the answers

What is the volume of air to be supplied to the new activated sludge plant in cubic meters per day?

38,000 m³ · day⁻¹ (A) Signup and view all the answers

What is the effective stack height at which the plume is released?

30 m (C) Signup and view all the answers

How much MSW is generated per day in the town in Germany?

19,000 kg (B) Signup and view all the answers

What is the capacity of each truck in metric tonnes?

4.5 t (C) Signup and view all the answers

What is the density of the waste in the landfill in kg · m⁻³?

470 kg · m⁻³ (D) Signup and view all the answers

What is the projected life of the new landfill site in years?

30 years (D) Signup and view all the answers

What is the area of the landfill in hectares?

78.4 ha (A) Signup and view all the answers