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An odorous gas emitted by a hot spring was found to diffuse 2.92 times slower than helium. What is the molar mass of the emitted gas?
What is the osmotic pressure, in atm, of a solution formed by dissolving 13.2 g of Al2(SO4)3 in 0.387 L of water at 34.1 oC? (R = 0.0821 L-atm/mol-K; 0 oC = 273 K)
Draw the two elimination products that could be formed by the reaction of 2-bromo-2-methylbutane with potassium hydroxide in ethanol at 78oC.
Then 25mL of distilled water was added to the beaker and 5 mL of .025 M Fe(NO3)3 solution was also added to make precisely 50 mL(total Volume). What is the molar concentration of the salicylic acid?
compound 1-iodododecane is a nonvolatile liquid with a density of 1.20g/ml. the density of mercury is 13.6g/ml. what do you predict for the height of a barometer column based on 1-iodododecane,when
Choose the two alkyl bromides and the hydrogenation method that must be used to synthesize these alkenes from acetylene.
A roller coaster car of mass 310 kg (including passengers) travels around a horizontal curve of radius 32 m. Its speed is 16 m/s. What is the magnitude and direction of the total force exerted on th
Two special steps in the experimental procedure are incorporated to reduce the loss of the calcium oxulate precipitate. Identify the steps in the procedure and the reason for each step?
The mass percent composition of the compound is 53.31% C, 11.19% H, and the rest is O. What is the molecular formula of the compound?
The heat of vaporization of water at 100 °C is 40.66 kJ/mol. Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100 °C.
Two ants race across a table 65 cm long. One travels at 4.45 cm/s and the other at 3 cm/s. When the first one crosses the finish line, how far behind is the second one?
Describe at least three possible sources of error in a titration experiment like this and, for each, explain whether the error would result in a calculated molarity that is too high or too low.
The Henry's Law constant for carbon dioxide gas in water at 25 oC is 0.031 mol/L-atm. Calculate the solubility of carbon dioxide in water at 25 oC in moles/L if the partial pressure of carbon dioxid
A novice skier, starting from rest, slides down a frictionless 36.0 incline whose vertical height is 220m. How fast is she going when she reaches the bottom?
Calculate the value of Kp at each temperature and discuss the results is the decomposition of CO2 an antidote for global warming
The volume of a sample of a gas collected over water at 32.0 degrees Celsius and 752 Torr is 627 ml. What will the volume of the gas be when dried and measured at STP?
Sodium hydroxide (NaOH) has a lattice energy of -887 kJ/mol and a heat of hydration of -932 kJ/mol. How much solution could be heated to boiling by the heat evolved by the dissolution of 23.0g of N
The second person, on the opposite side of the lock, pulls at an angle of 45o. With what force should the second person pull so that the net force on the raft is in the forward direction?
It takes 48.0J to raise the temperature of an 8.60g piece of unknown metal from 13.0c to 24.3. What is the specific heat for the metal? Express your answer numerically, in J/g.C
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
Find the volume of methane measured at 298K and 0.940atm required to convert 1.47L of water at 298K to water vapor at 373K.
A uniform circular plate of radius 2R has a circular hole of radius R cut out of it. the center C' of the smaller circle is a distance .80R from the center C of the larger circle. what is the posit
Calculate the density of sulfur hexafluoride gas at 723 torr and 27°C
Nitrogen gas react with hydrogen gas to form ammonia, if 14.01 g sample of N2 react with 4.07g of H2, how many of ammonia is formed?
A 82 kg water skier floating in a lake is pulled from rest to a speed of 13 m/s in a distance of 25 m. What is the net force exerted on the skier, assuming his acceleration is constant?