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    Hazardous Materials

    A Hazardous Material is one that presents a risk to health or the environment. For example, these materials may be toxic, flammable, radioactive or even corrosive – all properties which have the capability of harming the health of the natural environment. The study of Hazardous Materials spans all the disciplines of Chemistry. However, there is a specific focus on this topic in Environmental Chemistry, as there has been a recent movement towards a greener and more sustainable future. A specific branch of Environmental Chemistry, called Green Chemistry, specifically looks at the engineering of products that minimizes the generation of hazardous materials. In terms of the environment, Hazardous Materials play a role in the normal ecosystem. Environmental Chemistry aims to study and assess the nature of the hazard through the use of analytical techniques. For example, acid rain is corrosive and may even be toxic depending on the cause of the acidity. In order to assess the nature of the hazard, rain may be collected and its pH may be measured using a pH meter. If the pH is below 7, then the rain would be considered acidic. Then, analytical methods may be used to determine the cause of the acidity, which is usually attributed to industrial sulfur dioxide. © BrainMass Inc. brainmass.com February 3, 2023, 5:56 pm ad1c9bdddf

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    Calculating LD50 of sarin from lethal inhalation dose

    The lethal inhalation dose of sarin for a 200lb. person has been determined to be 0.0015mg. Determine the LD50 of sarin that researchers used to calculate this lethal inhalation dose. Possible answers: 1.4x10-4 mg/kg 0.16x10-4 mg/kg 1.8x10-5 mg/kg 0.00023 mg/kg Which of the above answers is correct?

    Hazardous Materials and OSHA Regulations

    All ammonium compounds, which contain an ammonium ion (NH4+) and a negative ion, are thermally unstable. A. Discuss two ways that ammonium compounds decompose when they are heated. What chemical reaction is involved in the thermal decomposition of ammonium persulfate? B. What is the most likely reason OSHA requires ammoni

    Explosimeter - Hazardous Materials

    a.You use a properly calibrated explosimeter to measure the flammable hazard inside a tank that contained toluene and may still have some residual product a. inside. Your readings show that the atmosphere inside the tank is twenty percent (20%) of the lower explosive limit (=LEL). Assume uniform mixing within the tank for the sa

    Waste Management

    You are the chief environmental officer of an industrial operation of your choosing. Describe your operation, its different components or stages, the materials used and the type of wastes generated. What is your waste management plan and approach for protecting the environment and human health?

    Greatest threat to US Farmlands

    The greatest threat to U.S. farmlands in the 1930s was arguably the Dust Bowl. What is the greatest current threat(s) to U.S. farmlands, and what are some possible solutions to it(them)?

    Nuclear power and sustainability

    I need assistance with an environmental class which is concerning energy sources. I am a little confused as to write this paper.

    Sustainable options in business

    A new global sustainable business and industry incubator network is expanding into a Paris suburb. They want to make the newly acquired building and operations more environmentally friendly, has asked your advice on four measures: a. They are considering renovation using some synthetic building materials. They understand that

    Hazardous Materials Question

    Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning: Carbon monoxide @ 1700 ppm; Carbon dioxide @ 7000 ppm; and Sulfur dioxide @ 600 ppm. Ignoring synergistic effects between these gases, which individual concentrations are cons

    Chemistry of Hazardous Materials

    When relatively small amounts of magnesium burns, the fires are extinguished using commercially available dry powder. Why might this fire rekindle days later as someone tries to remove the residue with water? What chemical process is involved here?

    Chemistry of Hazardous Materials

    Question 1: Concetrated acedic acid is a Class II combustible liquid. What is the molecular weight of acetic acid that will form 2 moles of CO2 assuming complete combustion? a. 60 b. 75 c. 88 d. 120 Question 2: When sulfuric acid is a component of polluted air, it chemically attacks statues, memorials and monuments

    Chemistry of Hazardous Materials

    What distillate is labeled by DOT as a Flammable Liquid to containers and Flammable (when warranted) to bulk packaging, freight, and railcar shipments, along with being a preservative for utility poles and cross ties? Answer Carbon black Flowers of sulfur Creosote oil Coal tar pitch Question 10 Which of the follo

    Oleum - Mass and Hazardous Features

    Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. A. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 . 5SO3? Show your solution. B. Discuss at least three potentially hazardous features associated with concentrated sulfuri

    Determining Balanced Equation: Coagulants and Flocculants

    We have an environmental chemistry class, we are presently discussing coagulants and flocculants. We are asked to write the balanced equation when glucose is reacted with ammonium chloride + epichlorohydrin + isopropyl alcohol. Therefore, I have the equation: C6H12O6 + NH4Cl + CH3ClO 1) Does this equation need a simpl

    Environmental Impact of Wood Preservatives PCP/CCA/Cresol

    I have an environmental chemistry course in which we are currently studying the environmental and health impacts of wood preservatives such as cresol, pentachlorophenol, and chromated copper arsenate. Question 1: For the 3 wood preservatives noted, would acidic vs. alkaline soil or water conditions cause more (or less) lea

    reaction rate of the aqueous route to oxidize SO2

    Consider the following aqueous route to oxidize SO2: SO2(aq) + H2O2(aq) -> H2SO4(aq) k = 1.1 X 10^3 L/mols a. The partial pressure and Henry's law constants for SO2 and H2O2 are 2.7 ppm (KH = 1.2 mol L-1atm-1) and 4.9 ppb (KH = 1.0E5 mol L-1atm-1), respectively. Calculate the reaction rate of this process. b. Calculate the re

    Producing a Rainfall Using H2SO4

    How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 4.0-cm rainfall of pH 2.00 over an area of 100 square kilometers?

    CH20 Waste

    Assume that a waste contains 395.0 mg/L of biodegradable CH2O and is processed through a 190000.0 L/day sewage treatment plant which converts 40% of the waste to CO2 and H2O. Calculate the volume(L) of air (at 25 degrees, 1 atm) required for this conversion. Assume that the O2 is transferred to the water with 20% efficiency.

    Volume of sulfuric acid produced from coal

    One metric ton (1000 kg) of coal is required to produce 7.3 MW-hr of electrical energy. In 1993, the Thomas Hill power plant (a small, coal-fired plant supplying rural electric cooperatives) produced 5900000.0 MW-hr. If low sulfur (1%) coal were used, and the gaseous effluent were the only means of discharging the sulfur, what v

    Calculating Mass Percentages

    Question: Calculate the mass percent of methanol, ethanol, and MTBE, that must be present in gasoline to yield a mixture of 1.8% oxygen by weight.

    Waste treatment plant

    **Assume that a waste contains 340.0 mg/L of biodegradable CH2O and is processed through a 200000.0 L/day sewage treatment plant which converts 40% of the waste to CO2 and H2O. Calculate the volume of air (at 25 degrees, 1 atm) required for this conversion. Assume that the O2 is transferred to the water with 20% efficiency**

    Flow Rate & Pesticide Concentration

    A certain pesticide is fatal to fish fingerlings at a level of 0.5 parts per million in water. A leaking metal can containing 10.0 kg of the pesticide was dumped into a stream with a flow of 10.0 Liters per second moving at 0.7 km/hr. The container leaks pesticide at a constant rate of 5.0 mg/sec. For what distance (in km) downs

    Calculating acid rain due to sulfuric acid from coal.

    How many metric tons of 5%-S coal would be needed to yield the H2SO4 required to produce a 2.5-cm rainfall of pH 2.00 over an area of 100 square kilometers? This is the second time that this question has been posted. First response received was incorrect. Hints given: Calculate vol rain, mol H+, mass of S, mass of coal.