Hello, I was wondering whether you would be able to complete my chemistry assignment that I have received. I have attached the task sheet, scaffolding for refuting the statement and scaffolding for supporting the statement (depending on which one you choose). The due date for this assignment is this Friday so I would prefer to
Indian mustard (brassica juncea) can be used for phytoremediation of lead in soil because it has the ability to hyper accumulate lead by a factor of 17. The average crop yield is about 4.0 kg per square metre. a) Calculate the expected plant concentration of lead if the soil contains 280 ppm. b) What mass of lead would p
Can you answer some more Q about the same problem and let me know the number of Credits you ask for please? And OK, next time I will post it in Engineering.. for the same problem: d-The theoretical chamber lenth,ft e-The design chamber lengh, ft, if the design length is 1.35 time the theoretical length and for ease of cons
Currently, I have an F average in this class and need assistance. Please assist me. If I receive a 100 this will bring my grade to at-least a C. My GPA 3.4 and it is important to me to maintain it. Please help
I need assistance with a project concerning demographic transition, which is little confusing to me. I am really concerned with this class as I have a failing grade. Any and all of your assistance will be greatly appreciated. I really need your help with this assignment Not all countries have moved through all four phase
Coal combustion can affect freshwater or marine (saltwater) organisms in different ways. Describe the steps involved in one such way, from combustion to the effect(s) on one species or group of organisms. Which environmental sphere(s) is involved in each step, and how?
environmental chemistry: water sample has a pH of 8.21 and a total calcium concentration of 143 ppm.
1. A water sample has a pH of 8.21 and a total calcium concentration of 143 ppm. (a) What are the molar concentrations of CO3 2- and HCO3- ? (b) What is the total alkalinity of the water?
Data: A chemical analysis of a surface water yields the following data: Ion Concentration mg/L Ca^(2+) 90 Mg^(2+) 30 Na^+ 72 K^+ 6 Cl^- 120 SO4^(2-) 225 HCO3^- 165 pH 7.5 Problem: The Cl^- concentration in the water analysis given has been questioned. What concentration of Cl^- (mg/L) would ma
What reasons could there be for different water sample results at four sites along a river? (see files attached with data)
The average pH of precipitation in rural areas is 6.80. Assuming that the pH Is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere; calculate the amount of calcium carbonate (mg) dissolved per liter of rainwater. pKa1=6.33, KCO2=3.388e-02 I've seen a couple different solutions
Calculating Ferric and Ferrous Concentrations - please see the attachment. Thanks.
A large pond is 300m by 95m with an average depth of 2.5m. Assuming that the pond is saturated with oxygen, calculate the amount of sugar (C12H22O11) in kg that would be sufficient to completely consume the dissolved oxygen.
For HCN in water, Ka = 2.0E-10. Calculate the fraction of cyanide that exists as the anion rather than in the molecular form at pH values of 4, 7, and 10.
A situation with an industrial input of arsenic directly into the lake at 10kg/Day. The lake volume is 1.2 x 10^8 m^3, and the average depth is 10m. The river velocities are measured as 100 L/min at both the inflow and outflow points. Water samples taken from the rivers show incoming arsenic is 0.02mg/L and the outgoing arseni
If a piece of Calcite (Calcium Carbonate) is put into the lake, would it tend to dissolve? Calcium carbonate solubility is 10^-8.35 M2, and the measured concentration of calcium ion is 0.1mM (millimolar) Information received: Lake pH=4, and total carbonate concentration of 0.001M. Carbonate Equilibria: CO2 + H20 <-> H2
6.21 Your metropolitan area has been warned by the EPA to lower sulfur dioxide and nitrogen oxide emissions or it will lose substantial federal funding. One citizen's group calls for conservation as a means of drastically reducing electricity consumption. A second group advocates curtailing the use of automobiles through a va