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A very flexible helium-filled balloon is released from the ground into the air at 20. . The initial volume of the balloon is 5.00 , and the pressure is 760. . The balloon ascends to an altitude of 20 , where the pressure is 76.0 and the temperature is - 50. . What is the new volume, , of the balloon in liters, assuming it doesn't break or leak
Sample were collected in a zinc smelter to determine the exposure of a furnace tender to lead fume during his normal work duties which involves "furnace draws" and general activities around the furnace.
What is the heat of combustion per gram of butane?
you are told that a sample of gas has a pressure of 837 a volume of 5270 and a temperature of 292 . if you use
When 25g of magnesium reacts with 75g of hydrochloric acid it produces 95g of magnesium chloride and hydrogen gas.
In the preparation of esters, the reaction product was extracted with 5% of sodium bicarbonate solution in the isolation step. Why? What gas was evolved during this washing step? Write a balanced equation for the reaction that produced it.
On a certain winter day in Utah, the average atmospheric pressure is 738 torr. What is the molar density (in mol/L) of the air if the temperature is -18 degrees Celsius
A tank containing carbon dioxide at 400K and 50 bar is vented until the temperature in the tank falls to 300K. Assuming there is no heat transfer between the gas and the tank
How do you write structural formulas for all the constitutionally isomeric compounds having the given molecular formula C3H9N,
Suppose polyethylene molecules in a solution can exist in either a random-coil conformation or in a fully stretched-out conformation. The stretched-out conformation is 2.4 kJ/mol higher in energy than the random-coil conformation.
Sodium atoms(Na) emit light with a wavelength(λ) of 330 nano meters when an electron moves from a state of 4 p orbital to a state of 3 s orbital now you just need to determine the energy difference between the orbitals.
What are the concentrations of H2SO4 and H2SO3 in a 25ml solution titrated with .1M NaOH. The first endpoint is reached after 37.89ml of NaOH are added (pH=7) and the second endpoint is reached after 43.57ml of NaOH are added (pH=9.8).
A situation with an industrial input of arsenic directly into the lake at 10kg/Day. The lake volume is 1.2 x 10^8 m^3, and the average depth is 10m.
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