Mass of the alcohol
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?
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If 4.00 ml of 0.0250 M CuSO4 is diluted to 10.0 ml with pure water what is the molar concentration of the copper (II) sulfate in the diluted solution ?
A company will be only as effective as the driving force behind it. Establishing a vision is important for any organization as it sets a roadmap for success. A mission statement reflects the goals and purpose of a company.
A simple cubic unit cell is composed of identical spherical particles with a diameter of 75 pm. What is the volume of the unit cell?
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 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.
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?
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?
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