Final temperature of the water-iron mixture
A 27.3 g sample of pure iron at 81 C is dropped into 56 g of water at 40 C. What is the final temperature of the water-iron mixture?
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A 455-g piece of copper tubing is heated to 89.5 Celcius and placed in an insulated vessel containing 159g of water at 22.8 degrees Celcius.
A solution of alcohol, C2H6O in water has a molality of alcohol of 3.25 mol/kg. In this solution, what is the percent by mass of the alcohol?
A company's beginning-of-the-year assets are $60,000 and liabilities are $40,000. During the year, the company reported income of $15,000, paid dividends of $5,000 and sold common stock for $4,000. Its year-end liabilities are $50,000.
A sample consisting of 1.00 mol of perfect gas atoms, for which Cv,m = 5/2R, initially at P1 =1.00atm and T1= 300k, is heated reversibly to 400K at constant volume. Calculate the final pressure, delta-U, q and W.
For the reaction A → 2B, the reaction rate is equal to its rate constant of 0.447mol L-1min-1. Your value for [A]o= 0.50 M, what is the half-life of the reaction?
A company has fixed costs of $75,250. Its contribution margin ratio is 35% and the product sells for $71 per unit. What is the company's break-even point in dollar sales?
Prepare journal entries to record these transactions and adjustments for 2010 and 2011.How much warranty expense is reported for November 2010 and for December 2010?
What quantity of energy is required to break up exactly 6 mol of SO2(g) into its constituent elements?
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