How many grams of sodium sulfate should be added
How many grams of sodium sulfate should be added to how many grams of sulfuric acid to give 1.00 L of buffer with pH 2.80 and a total sulfur concentration of 0.200 M?
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A tire holds air (assume it's all N2) at a pressure of 3 atm, and in one week the pressue drops by 1% because of inevitable leakage at the rim, when the temperature is 300 K.
You plan to purify a product by column chromatography using silica gel as your stationary phase. What is the minimum mass of silica gel needed to carry out purification?
If you wish to further purify this liquid after column chromatography, what techniques could you use? What would the limitation of carrying out this technique be?
Find the ideal Otto cycle efficiency and compare with the values of efficiency calculated from mpg rating. Comment on the results.
How long does this coal reserve of US will last if all coal is used to generate electricity? Assume the efficiency of converting coal to electricity is 35%.
A home receives 1.7 kW of electric power from a transformer on a nearby pole. The line from the substation to the transformer is at 9.0 kV and has 0.10 \Omega resistance. What fraction of the power is lost in this transmission line?
What is the Human Development Index? Suppose the world population in year 2100 will be 9 billion people. Assume the amount of energy needed to provide each person an acceptable quality of life is 100,000 MJ per year.
If a car traveled at an average speed of 80 km per hour for 20 minutes, and then slowed to an average speed of 50 lm per hour over the next 15 minutes. How far would it travel in total?
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