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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
what is the work in joules done on the system to compress He gas from 24.0 L to 12.5 L against a pressure of 1.5 atm at a constant temperature of 37.4 C?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 58.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 235.0 mL of solution. What is the molarity of the ethanol in this
Calculate the molar enthalpy change when mercury is cooled 10 K. The molar heat capacity of mercury is 27.8 J/K*mol
Suppose a similar experiment had been done using 1.0 M H3PO4 solution as the acid. What would be the expected stoichiometric ratio, mol H3PO4 / mol NaOH, at the intersection of the ascending and de
Diethyl ether is a volatile organic compound. the vapor pressure of diethyl ether is 401 mm Hg at 18 degrees celsius and the change in H vapor = 26.0 kJ/mol. Calculate the vappor pressure of diethy
What are the respective concentrations (M) of Fe3+ and I- afforded by dissolving 0.200 mol FeI3 in water and diluting to 725 mL?
A 105 g piece of metal is heated to 288 degrees C and dropped into 85.0g water at 26 degrees C. If the final temperature of the water and metal is 58 degrees C, what is the specific heat of the meta
3-di-t-butylcyclohexane exists in two forms that are known as the "chair" and "boat" conformations. at 580K, 6.42% of the molecules are in the chair form. calculate the value of the equilibrium cons
A 5.50 g sample of an unknown is dissolved in 251. g of benzene. The freezing point of the solution is 1.02 C below the normal freezing point of pure benzene. What is the molecular weight of the unk