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Calculate the wavelength (in picometers) associated with hydrogen atom moving at a speed of 3.13 x 10^3 cm/s
The melting point of the aspirin was found to be 110-115 celsius. Explain why the melting point was low and why the melting range was so wide
why is it essential to evaporate methanol quickly (within 10-15 minutes) if you are isolating the aspirin
A N2 molecule at 20 C is released at sea level to travel upward. Assuming that the temperature is constant and that the molecules do not collide with other molecules, how far would it travel (in met
How much corn syrup and how much water would you need to combine to create 500 ml of 10% corn syrup solution? Explain
If you have 375 molecules in a 10^-4 dilution, how many molecules were in the original solution
Propose a structure for a C6H15O2N compound that is unstable in aqueous acid and has the following NMR spectra:1H NMR:
To change the equilibrium constant from Kp to Kc, the value of RT at room temp. (25'C) you would have use is:
To what final volume would 100 mL of 6.0 M NaCl have to be diluted in order to make "physiological saline" (0.54 M NaCl)
How many moles of hydrogen are in a sample of octane, C8H18, that contains 303.9 grams of carbon
Concentrated HCl is a 12.0 M solution of HCl in water. How many milliliters of concentrated HCl must be diluted to 250 mL so that the resulting solution is 0.0500 M in HCl
Aqueous ammonia is commercially available in a solution that is 28% (w/w) ammonia. What is the mole fraction of ammonia in such a solution
Sketch a potential energy versus reaction coordinates diagram for the following reaction
Draw the Newman projection formulas for CH3CHBrCH2CH3 and sketch the potential energy versus rotation diagram for a 360o rotation of 2-bromobutane along C2 and C3 carbon atoms.
Calculate the percentage of monochlorinated products anticipated in the monochlorination of 2,4-dimethylpentane.
Suggest syntheses for the following compounds from organic compounds from organic compounds containing no more than four or fewer carbon atoms and any other necessary inorganic reagents.
How many mL of 0.100 M NaOH is required to react with 50.0 mL of 0.100 M H2SO4 according to the reaction 2NaOH + H2SO4 --> 2H2O + Na2SO4
The freezing point of 3.5 grams of an unknown organic compound in 100 ml of benzene is 5.0 c calculate the molecular weight of the unknown compound.
It requires 41.16mL of a particular NaOH solution to bring 1.0054 g of KHP (204.24 g/mol) to the bromocresol green endpoint. a 0.8054 g sample of an unkown monoprotic acid requires 44.30 ml of the s
The same mass of solute is dissolved in 9.82 g of t-butanol instead of cyclohexane. What is the expected freezing point change of the solution
a 0.8054 g sample of an unkown monoprotic acid requires 44.30 mL of the same solution to reach the same endpoint. what is the molar mass of the unknown monoprotic acid
The imaginary nonmetal E has two isotopes 50E(isotopic mass 49.9715 u abundance 76.66%) 52E (isotopic mass 51.9663 u) Calculate the atomic mass of E as it would appear in the periodic table.
The double head arrow represents an equilibrium arrow, not a resonance arrow. A reaction mixture, initially contains 11 mol of A and 0 mol of B in a fixed volume of 1 L.
A compound contains the elements Ca and F. Analysis indicates that 2.94 g of sample of the compound contains 0.93 g calcium. Calculate the mass of fluorine in the sample.
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [PCl5]eq = 0.56 M, [PCl3]eq = 0.23 M, [Cl2]eq = 4.4 M. PCl5(g) PCl3(g) + Cl2(g)