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In the technique of electron impact mass spectroscopy, molecular fragment are identified through a characteristic pattern of peaks at different values of m/z
A sample of air was compressed to a volume of 10.0 L. The temperature was 295.0 K, and the pressure was 8.60 atm. How many moles of gas were in the sample. Enter units.
This chamber is equipped with enough solid KOH to absorb any CO2 and H2O produced by the mouse. The gas volume in this chamber is measured to be exactly 2.20 L, at the temperature is held constant a
Intially the vessel contains 3.0 moles of methane, 3.0 moles of xenon, and 4.0 moles of oxygen. What would the partial pressure of methane be if 2.0 moles of methane are added to the vessel? Assume
Elemental analysis is performed on an organic liquid with a fishy odor. Vaporization of 275.0 mg of the compound in a 190-mL bulb at 110°C gives a pressure of 400.0 torr. What is the molar mass
Liquid helium at 4.20 K has a density of 0.147 g/mL. Suppose that a 1.50 L metal bottle at 110 K contains air at 3.0 atm pressure. If 50.0 mL of liquid helium are added to the bottle
A solution containing 50.0 mL of 0.15 M C2H3COOH is titrated with 0.15 M NaOH. What is the pH of the solution after the addition of 25 mL of NaOH. pKa for C2H3COOH is 4.76.
They are used as foaming agents, propellants, and refrigeration fluids. Freons are controversial because of the damage they do to the ozone layer in the stratosphere. A 5.87 g sample of a particular
In dry atmospheric air, the four most abundant components are N2, X = 0.808; O2, X = 0.1915; Ar, X = 9.34x10-5; and CO2, X = 4.066x10-4. Calculate the partial pressure of Ar, in torr, under standard
What is the main difference between the first titration in Part A and the second titration in Part B
The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 75.0m/s , what is its corresponding wavelength
Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (\rm nm), where 1\;{\rm nm}= 10^{-9}\;{\rm m}. What is the energy of the X-rays
A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz ({\rm MHz}), where 1\; {\rm MHz}=10^6\; {\rm Hz}. Calculate the broadcast wavelength of the radio stati
NaOH solution is used to determine the amount of Mg(OH)2 in a sample of milk of magnesia, (molairty of NaOH is 1.172M). A 10.0 gram sample of milk of magnesia is required with 8.00 mL of 6.00 M HCl.
Given that the rate constant for the decomposition of X is 1.60 M^-1 min^-1, calculate the concentration of X after 11.0min.
What would be the initial rate of formation of I3 (in units of M/s) when the following initial concentrations were used
Following is an example of a triprotic acid with pK values closer than 3 units, and pK3 less than 10. You have a 20.0 mL solution of the triprotic acid, H3A, with a concentration of 0.128 M, and are
Give the products of the following reactions (no reaction mechanism necessary). if the products can exist as stereoisomers, show which stereoisomers are obtained.
what is the molecular equation, ionic equation, and net ionic equation for magnesium reacting with hydrochloric acid
A calorimeter contains 26.0mL of water at 14.0\, ^{\circ}C . When 2.30g of \rm X (a substance with a molar mass of 46.0g/mol ) is added, it dissolves via the reaction rm X{(s)}+H_2O{(l)} \rightarrow
The fragment is dissolved in 50.00 mL of (H_{2}SO_{4}) solution is then treated with 2 g of Kl and 50.00 mL of the potassium iodate solution (1L of 0.01000M solution requires 2.14g of potassium ioda
what would be the major product obtained from the reaction of Br2 with 1-butene if the reaction were carried out in
A 50.00 mL sample of the solution (1L of 0.01000M solution requires 2.14g of potassium iodate), mixed with 2 g of potassium iodide and 10.00 mL of (H_{2}SO_{4}), is fully titrated with 38.50 mL of s
Predict the relative reaction times with ethanolic AgNO3 for the following compounds and rank them from fastest to slowest: 2-chloro-2-butene, 1-chloro-2-butene, 2-chlorobutane.
When halogens react they tend to gain electrons rather than lose electrons. Pick the best two reasons why this occurs.