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You are the project manager of an environmental company that was hired to cleanup a historical arsenic contamination site. Soil sampling results indicated the area impacted with arsenic above action levels is 30 feet by 55 feet. The depth of the arsenic plume is three feet below ground surface. The land owner wanted to clean this site for future development. Using your textbook, answer the questions below to help you prepare a cost estimate for this portion of the project. Your solutions and any assumptions to justify your estimate must be shown. 1. What is the chemical symbol of arsenic, and what group/family does it belong to? 2. Solve for the minimum volume of soil that will be excavated in cubic yards? 3. If each dump truck can transport 18 cubic yards, determine how many dump trucks loads will be transported? For calculation purposes, add a 15% "fluff factor" (add to the volume that will be transported). 4. If the bulk density of soil is 1350 kg/m3 (84.3 lb/ft3), solve for the weight of the soil that will be transported to a disposal site in kilograms? Your total response to parts a-d must be at least 200 words in length. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced. Paraphrased and/or quoted material must have accompanying citations in APA format.
Use the octet rule to predict the formula of the simplest compound formed from hydrogen and phosphorus.
The temperature is held at 271 K. Calculate the work done by the gas(in joules). to give the appropriate sign
A chemist needs a pH 3.5 buffer. Should she use NaOh with formic acid ( Ka =1.8x10-4exp.) or with aceticacid ( Ka = 1.8x10-5 exp)? Why. What os the disadvantage of choosing the other acid. What is the role of NaOH
A stock solution is prepared by adding 20 mL of 1.21 M AlCl3 to enough water to make 72 mL. What is the Al3+ concentration of 30 mL of the stock solution
Complete and balance the reaction: H3PO4(aq) + Ba(OH)2 ---> b) Name the products c) Write the net ionic equation
If it takes 3 breaths to blow up a balloon to 1.2 L, and each breath supplies the balloon with 0.060 moles of exhaled air, how many mols of air are in 3 liters
explain how dimer tetramer or other oligomeric versions of quarternary protein structure can be energetically
3 enclosed flasks with different volumes have 50 ml of h20 at the temperature of forty degree celsius volume of flask 1
In the study of a second order gas phase reaction, it was found that the molar concentration fell from 200 mmol L-1 to 80 mmol L-1 in 1.20x104 seconds. What is the rate constant of the reaction
A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 31 degrees C and 1.00 atm?
Suppose that you titrate 50.00 mL of a 0.0200 M Fe3+ solution (buffered at pH = 4.00) with 0.100 M EDTA. For all questions below, I am looking for a nonzero numbers.
Calomel (Hg2Cl2) is not toxic however methyl mercury chloride (CH3HgCl) is highly toxic. Explain what physical property explains this difference in toxicity. Mercury and Mercury Poisoning
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