Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 6, Problem 19P
To determine
Find the relative abundance of the earth at present.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Could you give me some explanation, the correct answer is at the bottom of the question.
please solve & plug in the numbers in any equation used
1 A woman works in a factory for 15 years. The drinking water in the factory contains xylene and fluoride. Her only exposure to these chemicals in water is at work. Using Table 10,find the hazard index associated with this exposure?Xylene: 0.6 mg/LFluoride: 3.1 mg/L
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- I need helparrow_forward.A Batch Reactor with a volume of 11.859 m³ is being used to treat liquid waste from a small seafood processing industry. Every week 1.461 kg of waste is added to the reactor with water, so that the final volume is 11.859 m³. The reactor is emptied after a week and a new batch of waste (same mass) is added. If the decay rate of the waste is 0.442 d¹, determine the final concentration = ? mg/L of the waste after a week.arrow_forwardQuestion 4 2.5 pts Nitrogen gas can be combined with oxygen to form nitric oxide (NO) as shown in the following chemical reaction: N2 (g) + O2 (g) 2 NO (g) When the reaction is in equilibrium, the concentration of N2, O2 and NO are 280 g/L, 640 g/L, and 750 g/L, respectively. If the concentration of oxygen gas dropped to half, calculate the concentration of nitric oxide (NO) in g/L when the system returns to equilibrium. (N=14, O=16 g/mol) Enter your final answer with 2 decimal places.arrow_forward
- Problem 3. A nuclear-power station produces 750 MW per year as useful energy. costs include 150 MW lost in distribution, and 290 MW lost as heat. What is the efficiency of the plant? The energyarrow_forwardCalculate the total mass of CO2 in the atmosphere. State all assumptions. Compare this to the actual of ~3.6 ×1012 tonnes. At our current rate of emissions, how long would it take to emit a quantity equal to the present mass of CO2 in the atmospherearrow_forwardIt has been suggested that carbon dioxide emissions should be taxed at $30 per metric ton (106 g C). Removal of CO2 from the atmosphere would be worth the same amount. Assume that the atmospheric mixing ratio of CO2 is 400 ppm. What is the value of the carbon in 1 cubic kilometer (km3) of air at Earth’s surface? Calculate the value of all the CO2 in Earth’s atmosphere? [Hints: The total atmospheric mass is 5.1480×1018 kg and it is composed of 80% N2 and 20% O2.arrow_forward
- Read the question carefully and give me right solution according to the questionarrow_forwardMethanol (CH3OH) can be degraded as shown in the reaction below. Answer the following questions if methanol is present in a water at a concentration of 260 mg/L and the water flowrate is 1.7 million gallons per day (mgd). 2. CH3OH + 1.5 O2 → CO2 + 2 HLO What amount of carbon dioxide (CO2) will be produced each day (in lbs and kg)? How much oxygen (O2) will need to be supplied to degrade the methanol (in mg/L and lbs/day) if the oxygen transfer process is 48% efficient? а. b.arrow_forwardQ3: B: A 208 g of C6H6 (78 g/mol.) burns in air according to the equation: CHs + O2 - CO2 +H2O What mass of CO2 (44 g/mol.) is produced?arrow_forward
- choose the correct answerarrow_forwardThe concentration of chlorine in a water tower tank was 2 mg/L when the tower was taken out of service. If the chlorine decays by first-order kinetics with a rate constant of 1.0 1/d, what is the chlorine concentration when the tank is put back in service 8 hours later? What mass of chlorine in kg must be added to the tank to raise the chlorine level back to 2 mg/L. (Assume completely-mixed tank).arrow_forwardAn industry is planning to use a 250 m3 bioreactor to treat 400 m3/day of wastewater containing 80 mg/L of benzene (CsHe). Benzene is expected to degrade by microbial action in a completely-mixed reactor (CSTR) with a first-order degradation rate coefficient of 5.0/ day a. Write a balanced reaction for the complete oxidation of benzene to carbon dioxide and water. b. Draw a diagram and write a mass balance equation for benzene in the tank reactor. c. Assuming steady-state conditions, determine the concentration of benzene in the outflow d Determine the mass of benzene that comes into the reactor each day, the mass of benzene that goes out of the reactor each day, and the mass of benzene that is degraded each day. e. Calculate the percent removal. If air is com bubbled oxygen transfer efficiency is equal to 15%. posed of 21 percent oxygen, estimate the volume of air that would have to be through the reactor each day. Assume the air temperature is 25°C and that the Ans: c) 19.4 mg/L d)…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning
Solid Waste EngineeringCivil EngineeringISBN:9781305635203Author:Worrell, William A.Publisher:Cengage Learning,
Engineering Fundamentals: An Introduction to Engi...
Civil Engineering
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Cengage Learning
Solid Waste Engineering
Civil Engineering
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Cengage Learning,