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A balloon is filled to a volume of 7.0 102 mL at a temperature of 39.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 102 K. What is the final volume of the balloon
Suppose that the microwave radiation has a wavelength of 12 . How many photons are required to heat 275 of coffee from 25.0 to 62.0 ?
What is meant by hydrogenation? please answer in a simple and easy to understand?
Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
manganese makes up 1.3 x 10^-4 % by mass of the elements found in a normal healthy body. How many grams of manganese would be found in the body of a person weighing 204 lbs?
If the partial pressure of oxygen drops below 100 mmHg , passengers become drowsy. If this happens, oxygen masks are released. What is the total cabin pressure at which oxygen masks are dropped?
A balloon is filled to a volume of 7.00 times 10^2 mL at a temperature of 20.0 degrees celcius. the balloon is then cooled at constant pressure to a temperature of 1.00 times 10^2 K. what is the fin
How many grams of iron metal do you expect to be produced when 265 grams of an 84.5 percent by mass iron (II) nitrate solution reacts with excess aluminum metal? Show all of the work needed to solve
A gaseous mixture of and contains 37.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 785 ?
They argue over whose balloon has gas molecules zipping around at greater average velocities. Resolve the argument.
Calculate the heat absorbed by 15.0 g of water to raise its temperature from 20.0oC to 50.0oC at constant pressure. The specific heat of water is 4.18 J/g.oC
A gas occupying a volume of 139 mL at a pressure of .970 atm is allowed to expand at constant temperature until the pressure reaches .541 atm. What is the final volume?
In bombarding atomic nuclei with proton "bullets", why must the protons be accelerated to high energies if they are to make contact with the target nuclei?
Patients suffering from respiratory disorders are often treated in oxygen tents in which the atmosphere is enriched in oxygen. What is the partial pressure of O2 in an oxygen tent consisting of 45%
The concentration of a solution sodium iodide ion will be determined by titrating 90 mL of it using potassium permanganate. What is the concentration of NaI?
Calculate the amount of heat required to completely sublime 51.0 g of solid dry ice (CO_2) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol .
If coal is made up of 44% pure carbon, by mass, calculate the maximum volume of methane which could be produced from 2.0 kg of coal at NTP conditions. Calculate the theoretical yield percentage if 5
You are given 2.56 g of salicylic acid. Using the procedure in the lab manual for the synthesis of aspirin, you recover 0.89 of aspirin. Calculate your percent yield of aspirin
Interpret and explain the information on the herbicide label including the use of pictograms and supplemtary information provided by the manufacture or dealer as it relates to handling, storage and
An underground iron pipe in damp soil is to be protected from rusting. Which of the following techniques would NOT work?
A tightly sealed 5.0 L flask contains argon at 71.6 deg. C and 781 mm Hg. The flask is heated until the pressure is doubled. What it the temperature of the gas?
When she introduced 3.63E-2 moles of N2(g) and 6.18E-2 moles of H2(g) into a 1.00 Liter container, she found the equilibrium concentration of NH3(g) to be 9.68E-4 M. Calculate the equilibrium consta
The total quantity of coal burned in Canada and the United States in a year is approximately 450 x 106 t. The average quantity of sulphur in coal is 2.5%. Calculate the mass of sulphur contained in
A solution containing 10 grams of an unknown liquid and 90 grams of water has a freezing point of -3.33 degrees celcius given kf=1.86 for water the molar mass of the unknown liquid is?
You are the environmentalofficer attatched to Pesticide and Toxic Chemicals Control Board. Prepare a technical brief for the Chairman of the Board on strategies for the disposal of herbicides and h