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The pKa of acetic acid, HC2H3O2, is 4.76. A buffer solution was made using an unspecified amount of acetic acid and 0.30 mol of NaC2H3O2 in enough water to make 1.50 L of solution. Its pH was measured as 4.50 on a meter. How many moles of HC2H3O2 were used?
Executives estimate, for the first year, that they will have gross revenues of $500K, total costs of $300K, $30K in tax deductions and a one-time start-up credit of $8K. What will the company pay in income tax?
What is the mass of 8.00 1022 molecules of tetraphosphorus decaoxide? (b) How many P atoms are present in this sample?
Calculate the expected annualized compound rate of return over the five years for each bond. Which bond offers the higher expected compound rate of return?
study where a drug was given to 10 patients and a placebo to another group of 10 patients to determine if the drug has an effect on a patient's illness?
Determine the weighted-average unit contribution margin. Determine the break-even volume in units for each product. Determine the total number of units that must be sold to obtain a profit for the company of $234,000.
How will the money supply be affected by this transaction ? what is the ultimate change in deposits, loans, and reserves in the banking system? Explain in detail.
Diversification in an investment portfolio is a significant concept for creating the highest return for the least amount of risk. To create this diversification portfolio managers consider the covariance and correlation of investments. Explain how..
A sample of 36 packages reveals the mean weight to be 3.01 pounds, with a standard deviation of 0.03 pounds. Determine a 95 percent confidence interval for the population mean.
In 200-250 words: What are the challenges and opportunities of new financial innovation (e.g. exchange trade funds, high frequency trading, collateralization, securitization) facing individual investors
You are analysts comparing the performance of two portfolio managers using the Sharpe Ratio measurement. Manager A shows a return of 16% with a standard deviation of 10%. Manager B shows a return of 11% with a standard deviation of 6%. If the risk..
explain why granulated activated charcoal is considered to be the best available treatment technology for dioxins in water.
A 0.5078g sample of impure nitrobenzene was treated with 1.044g of tin. when the reaction was complete, the residual tin was found to weight 0.338g. Calculate the percentage of nitrobenzene in the sample.
Write the expression for the reaction rate in terms of d[NOCl]. c. The concentration of NOCl drops from 0.580 M to 0.238 M in 8.00 min. Calculate the average rate of reaction over this time interval.
when 0.120 mol of carbonis burned in a closed vessel with 6.90g of oxygen. how many grams of carbon dioxide can form??
A piece of a newly synthesized material of mass 25.0 g at 80.0C is placed in a calorimeter containing 100.0 g of water at 20.0C. If the final temperature of the system is 24.0C, what is the specific heat capacity of this material?
How many calories are required to warm 15.0 g of water from 75 C to 100.0 C and convert it to steam at 100.0 C? The heat of vaporization of water is 540 cal/g.
If the mass of the ore from which the gold was extracted is 166.0 g, what percentage of the ore is gold.
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
A 2.914-g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temperature greater than 170 Celsius in a crucible until a constant mass is reached.
A mixture of gases containing 21.0 g of N2, 106.5 g of Cl2, and 12.0 g of He at 14 oC is in a 50.0 L container. What is the partial pressure of N2.
Separation of acidic, basic & neutral substances in solution, Draw a flow sheet to show how you would separate the components of a mixture containing and acid substance
calculate the molar solubility of silver iodide in 3.0 M NH3. overall formation constant for Ag(NH3)2" is 1.7 x 10^7
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