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Give a one-paragraph summary of a known toxin that interests you, including basic information such as its occurrence in natural or anthropogenic sources, prevalence of human exposure, and reported toxicological effects. Cant be Lead.
What is the pH of a solution that has an initial concentration of 0.25 M oxalic acid and 0.35 M oxalate ion? Consider only the first ionization of oxalic acid (Ka = 5.9 x 10-2).
Question- A Chem instructor synthesizes a compound composed of carbon, hydrogen, and nitrogen and submits 0.1156 g of it to combustion analysis. The TA recovers 0.3556 g of carbon dioxide and 0.0655 g of water. What is the empirical formula of the..
Discuss the value that non-executive board members bring to an organization. Provide specific examples to support your response.
Use the standard reduction potentials below to determine which element or ion is the best reducing agent
Problem- Reaction mechanism needed for reacting Guanidine Carbonate with 2,4-pentanedione using NaOAc to give the product 2-amino-4,6-dimethylpyrimidine.
Its composition is 17.01% Na, 47.46% S and 35.52% O by mass. Determine its empirical formula. If the Molar mass of sodium tetrathionate is 272. What is its actual formula? Na2S2O3 + I = NaxSx + 2Nal
The half-life of 137Ce is 30 years. How many grams of 137Ce must be produced now to have a sample containing 32 g of 137Ce 190 years from now?Answer in units of g
A patient needs 2.70×10^-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
Using appendix C compare entropies at 25 degrees C for the following pairs of substances. For each pair, explain the difference in the entropy values.
vitamin tablet contains 125 mg of vitamin C (C6H8O6). How many vitamin C molecules are contained in the tablet?
A solution made by adding 20g of urea to 125g of water has a vapor pressure at room temperature of 22.76 torr, whereas the vapor pressure of pure water at 25 degrees celsius is 23.76 torr. find the molar mass of urea
Question- You have a solution of acetic acid (pKa = 4.76) at a pH of 6.00. What is the ratio of acetate ion to acetic acid at equilibrium? CH3COO-/CH3COOH =
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