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A convinced mass of magnesium is reacted with 6M HCL. The hydrogen gas liberated is collected by displacing 200 ml of water. The pressure of the gas as well as the atmospheric pressure is equalized. The atmospheric pressure is 762 mmHg. The temperature of the experiment is 27 C. Define how many moles of hydrogen have been liberated, as well as what is the mass of the magnesium that reacted?
When a container is filled with 3.00 mol of H2 , 2.00 mol of O2 , and 1.00 mol of N2 , the pressure in the container is 465 kPa. determine the partial pressure of O2?
A long glass tube, sealed at one end, has an inner diameter of 10.0 mm. The tube is filled with water and inverted into a pail of water. If the atmospheric pressure is 774 mmHg, how high (in mmH2O) is the column of water in the tube
carbon and oxygen occupies a volume of 452 ml at 63 C and 745 mmHg. identify the gas in the sample (R= 0.0821 L*atm/K*mol)
hanol, C2H5OH, is being promoted as a clean fuel and is used as an additive in many gasoline mixtures. Calculate the ?H°rxn for the combustion of ethanol.
The compound butane consists of only C and H. If 0.531g of butane is burned in oxygen and produces 1.61g of CO2 and 0.823g of H2O, what is the empirical formula of butane
What is the basic structure of phosphatidyl cholines and how do they work as emulsifiers? Why is there so much research interest in phosphatidyl cholines and similar compounds in heart research?
Compute the change in temperature when 2 g of sodium chloride is dissolved in 270.0 mL of water initially at 25 C. The heat capacity of water is 4.184 J/mL/K. Neglect the heat capacity of the NaCl.
Which one of the following aqueous solutions will have the lowest boiling point temperature. (Explain or show work) All numbers are subscripts - I didn't know how to type subscripts on here.
A line in the ultraviolet region of the hydrogen spectrum has a wavelength of 102.5 nm. What is the transition responsible for this wavelength
How does nuclear magnetic resonance imaging allow us to see inside human bodies? In what other ways do you think this technology could be used
Ben Franklin dropped the oil on the surface of a lake and found that 2 mL of oil gave a circle of radius 30 m. Estimate the volumetric size of an oil molecule in angstroms, give one significant digit.
The density of germanium is 5.325 g/cm3. If you made a 5.3-nm diameter quantum dot of germanium, how many Ge atoms would it contain? Assume the dot is spherical.
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