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A sealed balloon is filled with 1.40 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 220. torr and the temperature is -30°C. What is the change in volume of the balloon as it ascends from 1.00 atm to a pressure of 220. torr?
40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 5.10. What was the concentration of the original acetic acid solution. (Ka(CH3COO..
Calculate acidity of sample and express in % (w/v) CH3COOH. show complete solutions and please don't cite websites or like
Find the concentration of the HCL solution in moles/liter. b). How could the HCl soluted be diluted to make 1000ml of HCl solution with a concentration of 0.400M
a piston has an external pressure of 15.0 . how much work has been done if the cylinder goes from a volume of 0.150
Determine the molecular formula of the compound at the temperature of 120 degrees celsius and Pressure 750 mm hg, if 1 l of the gaseous compound weighs 2.3 grams? '
3 5L flasks fixed with pressure gauges and small valves, each contain 4 g of gas at 273K. Flask A has H2, B has He and C has CH4. Place in order of pressure
At 4.00 L, an expandable vessel contains 0.864 mol of oxygen gas. How many liters of oxygen gas must be added at constant temperature and pressure if you need a total of 1.60 mol of oxygen gas in the vessel
Express your answer in condensed form in order of increasing orbital energy. Write out the electron configurations for:
How many grams of CH4 must be burned to release 554 kJ of heat based on this thermochemical equation:
Synthetic polypeptides can assume an helical structure under appropriate conditions. Indicate whether polylysine and polyglutamate form an helix or a disordered structure at the indicated pH values.
The EPA limit for lead in the water supply is 15 parts per billion by mass. Calculate the number of lead ions present in 1.00 kg of water that is at the EPA limit for lead.
A sample of a dish from an archaeological dig gave 18 500 disintegrations per gram of carbon per day. A 1.00-g sample of carbon from a modern source gave 22 080 disintegrations per day.
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