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A mixture of carbon and sulphur has a mass of 9.0 g. Complete combustion with excess oxygen gives 23.3 g of a mixture of carbon dioxide and sulphur dioxide. Find the mass of sulphur in the original
Because atoms are spherical, they cannot occupy all of the space of the cube. The silver atoms pack in the solid in a such a way that 74% of the volume of the solid is actually filled iwth the silve
Determine the molar concentration range of the iron(II)-bathophenanthroline complex that can be analyzed directly with a spectrophotometer, using a 1-cm cuvette.
You pour 1 liter of water into a thermally insulated, electrically heated teapot which you then plug in. how long will you have to wait for the water to boil and for the pot to whistle?
The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1 degrees Celsius and 100.0 torr at -6.3 degrees Celsius. What is delta Hvap of chloroform?
A 27.00 g sample of an unknown hydrocarbon was burned in excess oxygen to form 88 g of CO2 and 27 g of H2O. What is a possible molecular formula for the hydrocarbon? (the hydrocarbon contains only
Explain how dimer, tetramer, or other oligomeric versions of quaternary protein structure can be energetically favorable. After all, everything in nature tends to go to a state of disorder.
Given that automobile engine operates irreversible, is the actually heat released greater than, less than, or equal to the value you calculated in part b)? explain your reasoning.
The force constant for H-Br is 516 Nm^-1 , Assume that only H atom moves (mass of H = 1.67 x 10^-27 Kg) . What would be the separation between adjacent vibrational levels ?
What wavelength lambda should the astrophysicist look for to detect a transition of an electron from the n= 5 to the n=3 level?
How many kilograms of limestone should be added for every kilogram of iron ore processed in a blast furnace if the limestone is 95.00% pure and the iron ore contains 13.40% SiO2 by mass?
If you know that 1.0 x 10^4 squared meters = 2.47 acres, and that there is approximately 5 cubic centimeters in a teaspoon, what is the thickness of the layer of oil?
A lagoon with volume 1200 m3 has been receiving a steady flow of non-conservative waste at a rate of 100 m3 /day for a long enough time to assume that steady-state conditions apply. The waste enteri
Fish are sensitive to Se concentrations over 0.04 mg/L. The farmer agrees not to use more water than will keep the stream selenium level below this critical concentration.
Why does the book not use NaOH for both synthesis of 1-butanol from 1-chlorobutane and then from 2-chlorobutane? for 2-chlorobutane it makes 1-butene first.
A plot of density of ethyl alcohol as a function of temperature was found to be linear. What would you expect the value of the y-int. to be?
If oxygen gas were collected over water at 22 degrees Celsius and the total pressure of the wet gas were 650 mm Hg, what would be the partial pressure of the oxygen?
The gauge pressure in an automobile tire reads 32 psi in the winter at 32 degrees Fahrenheit the gauge reads the difference between the tire pressure and the atmospheric pressure (14.7 psi).
Combustion of a 0.9835 g sample of a compound containing carbon, hydrogen, and oxygen produced 0.3500 g of H2O. What is the percent hydrogen in this compound?
Two aqueous sulfuric acid solutions containing 20.0 wt% H2SO4 (SG=1.139) and 60.0 wt% H2SO4 (SG=1.498) are mixed to form a 4.00 molar solution (SG=1.213).
How would an applied chemist utilize a theortical molecular reaction that had performed well in the acadenic lab to improve an industrial chemical problem?
Water for irrigation is usually expressed in units of acre-feet. One acre foot is enough water to cover one acre of land to a depth of 1.00 feet. (1 acre = 43,560 ft2).
A piston pump containing 2 liters of Nitrogen gas at 2,000 psia pressure empties its entire contents into a 10 liter pressure container. Before the transfer of the gas the container already containe
A 60 liter tank containing an ideal gas at a pressure of 40 atmospheres is connected by a valve to a 30 liter tank of an ideal gas at 70 atmospheres. The valve is opened slowly and the gases in the
How does adding a small amount of a Grignard reagent solution to a Grignard reaction help the reaction get started? Hint: The presence of water (moisture) is a major reason a Grignard might not sta