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A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740.0 torr and a temperature of 25.0°C. What was the new volume of the gas when the temperature was changed to 50.0°C and the new pressure was 760.0 torr?
Which of the seven Anions will be the hardest to detect (same anions as above), Why do you think this? If two or more are possible explain why.
A current of 3.15 A is passed through a Pb(NO3)2 solution for 1.40 hours. How much lead is plated out of the solution.
Calculate the density of a block.
Assuming all gases are at the same pressure and temperature, how many liters of CO2 are formed from 15.0L of CO.
Calculate the change in Gibbs free energy for each of the following sets of delta H, delta S and T. Predict whether or not the reaction will be spontaneous at temperature indicated.
The volume of a drop of rain was found to be 0.448 ml at N.T.P. How many molecules of water and number of atoms of hydrogen are present in this drop.
A low-melting solid A was isolated, which combustion analysis showed had composition C9H10O. The substance gave a precipitate when treated with 2,4-dinitrophenylhydrazine solution.
A gas mixture is made by combining 7.9 g each of Ar and Ne and an unknown diatomic gas. At STP the mixture occupies a volume of 18.73 L.
Calculate the number of grams of CuSO4 needed to make 50.0 ml of a .25M solution of CuSO4 in 3.0M HCl.
What is the main structural feature of the azo dyes that causes them to be colored compounds?
How much heat is required to vaporize 351 g of liquid ethanol at its boiling point.
You have a 1 L. container of a gas O2 at 20 degrees celcius and 1 atm. subtracting the weight of the container, what is the mass of the gas?
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