How much sodium hydroxide in grams must be added to a sample
Magnesium ions can be precipitated from seawater by the addition of sodium hydroxide. How much sodium hydroxide in grams must be added to a sample of seawater to completely precipitate the 89.2 mg of magnesium present?
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Discuss briefly the similarites and differences between all known kinds of intermolecular forces. Use mathematical expressions to support your discussion.
A spring is hanging vertically from a ceiling. (Assume the spring's mass is negligible.) I hang a 0.5kg mass on the spring and let the spring slowly stretch to an equilibrium position.
What would be the final temperature of an average natural gas at 320oF, when the pressure is dropped from 3000 to 1800 psia?
New York City is the most expensive city in the United States for lodging. The mean hotel room rate is $204 per night (USA Today, April 30, 2012). Assume that room rates are normally distributed with a standard deviation of $55. What is the cost o
For the air system, the work is -62 BTU. Determine the final volume. A power cycle with a thermal efficiency of 28% has Qin=600 Btu, what is Qout in Btu?
If the standard deviation for the salaries of both genders is approximately $5200 and the salaries are normally distributed, find the 90th percentile salary for male professors and for female professors.
A dragster starts from rest and has an acceleration described by the graph. Determine the time t' for it to stop. Also, what is the its maximum speed?
A sample of gas contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of each gas when the total pressure is 750. torr? Hint: assume a 100. g sample of gas.
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