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List 4 isotopes with their approximate atomic weight and approximate percentages commonly found in organic molecules that can be used to help determine the molecular formla of unknown samples using mass spectrometry measurments
She then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution. What is the concentration of KOH for the final solution.
what would be the effect on this experiment if the student Aceton +benzaldehyde ----> dibenzalacetone a. added half the amount of benzaldehyde?
What is the vapor pressure of SiCl4 in mm \ Hg at 31.5 C? The vapor pressure of SiCl4}is 100 mm \ Hg at 5.4 C, and Delta H vap} = 30. kJ/mol
A student following the procedure in this experiment prepared three solutions by adding 11.50, 23.00, and 34.50 mL of a 7.60 x 10-2M NaOH solution to 50.00 mL of a .112M solution of a weak acide. The solutions were labeled 1, 2, and 3 respectively
.80g of hydrogen chloride () is dissolved in water to make 4.5L of solution. What is the pH of the resulting hydrochloric acid solution
if temperature and pressure remain constant, how does the volume of a gas sample vary with the number of moles of gas present
Hsolution for neutralization of HCl(aq) and NaOH(aq): Volume of HCl: 0.050 L Volume of NaOH: 0.050 L Volume total: 0.10 L Molarity of HCl: 1.99 M Molarity of NaOH: 1.99 M ?T for reaction B: 12°C Calculate the value (calories) for the heat of react..
The PH° of formation values for water vapor and liquid water are -241.82 and -285.83 kJ/mol, respectively. Calculate the PH° of vaporization for water in kJ/mol.
Propane burns in oxygen to produce carbon dioxide and water. c3h8 +5o2 yeilds 3co2 +4h2o Calculate the math of co2 that can be produced if reaction of 44g of propane and suficient oxygen has a 60% yeild.
determine K for this reaction When a sample of 5.63 grams of pure C 5 H 6 O 3 (g) was sealed into an otherwise empty flask of 2.50 L and heated to 200.
Suppose that S is regarded as a function of P and T. Show that TdS = CpdT- aTVdP where a is the thermal expansion coefficient. (a=alpha)
A center of chirality (from the Greek cheir, hand) imparts the property of handedness to a molecule. In this part of the experiment, the left- or right- handedness of molecules with a chiral center will be illustrated with models.
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