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An absorber packed to the height of 4.5 m with 1.0-in. Raschig rings has been designed to reduce the concentration level of a mercaptan pollutant in an exhaust stream from 5.0 to 0.3 mol %. A nonvolatile, mercaptan-free solvent stream will be fed to the top of the tower and will flow countercurrent to 0.236 m3 /s of the exhaust gas stream.
The solvent leaves the bottom of the tower containing 3.05 mol % mercaptan. At the pressure and temperature of the tower, 293 K and 1.013×105 Pa, the equilibrium data for the mercaptan-solvent system are as follows:
Determine the diameter of the tower if the gas pressure drop within the packing is limited to 300 N/m3 of packing.
The gas enters the tower with an average molecular weight of 30.1 and the liquid stream, leaving the bottom of the tower, has an average molecular weight of 180, a specific gravity of 0.81 and a viscosity of 3.9×10-3 Pa.s.
Lindenwood Marine, Inc. was awarded a contract by the federal government to build flood control dams along the Missouri River. In April 2010, Lindenwood entered into a contract with Noell Engineering, a Missouri engineering company, to construct spec..
Staal Corporation will pay a $2.82 per share dividend next year. The company pledges to increase its dividend by 3 percent per year indefinitely. If you require a return of 10 percent on your investment, how much will you pay for the company’s stock ..
Several years ago, Castles in the Sand Inc. issued bonds at face value of $1,000 at a yield to maturity of 5.0%. Now, with 5 years left until the maturity of the bonds, the company has run into hard times and the yield to maturity on the bonds has in..
Investors and creditors are typically not interested in the same thing. Investors are typically interested in whether a company is going to turn a profit over time, while a creditor is interested in short-term cash flow. Decide whether you are an inv..
Critically reflect on the importance of present and future values. What factors must be considered when calculating present and future values? What other qualitative factors play into present and future value decisions? Perhaps you have opportunities..
Compute the market value of the firm, value of shares and the average cost of capital from the following information.
The Timber Ridge Company has the following relationships: Sales/Total assets = 3.55; ROA = 0.0930 What is Timber Ridge’s net profit margin?
Your firm has an average receipt size of $125. A bank has approached you concerning a lockbox service that will decrease your total collection time by two days. You typically receive 7,000 checks per day. The daily interest rate is .016 percent. The ..
1.how firms estimate their cost of capital the wacc for a firm is 13.00 percent. you know that the firmrsquos cost of
Ranyard's beta is 1.04, and the last dividend per share paid was $3.92. The market risk premium is estimated to be 7.82%, and the real rate of interest is 2.18%. The liquidity risk premium is 0.9%. Analysts expect the company to grow at a rate of 3.6..
BDJ, Inc. has 31,000 shares of stock outstanding with a market price of $15 per share. If net income for the year is $155,000 and the retention ratio is 75%, what is the dividend per share on BDJ Inc.'s stock?
Mississippi River Shipyards is considering the replacement of an 8-year-old riveting machine with a new one that will increase earnings before depreciation from $24,000 to $54,000 per year. The new machine will cost $85,000, and it will have an estim..
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