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You are given 10.00 grams of a mixture of FeO and Fe2O3. Complete reduction of this mixture yields 7.58 grams of pure Fe. Calculate the mass of FeO and Fe2O3 in the original sample. (Show all your work including calculation.)
if a total of 702 mol of nahco3 and 2.4 mol of c6h8o7 react how many moles of co2 and na3c6h5o7 will be
In the electron transport chain, electrons from FADH2 are eventually used to reduce O2 into H2O. Experimentally, the proton motive force created by this process will generate 2 ATP molecules from ADP and Pi, using ATP synthase. From the informatio..
Which of the following wave functions are eigen functions of the operator d^2/dx^2? If they are eigen functions what is the eigen value
Perform the calculatons for the extraciton of 100 mg of P in 300mL of water with three 100-mL portions of ether. assume the partition coefficient is 3.5
One liter of water will dissolve 2.15* 10^-3 mol of PbF2 at 25 degrees c. Calculate the value of ksp for PbF2.
a solution of water kb0.512 c and glucose freezes at 4.15. what is the molal concentration of glucose in this solution?
Run in the forward direction to restablish equilibrium. B. Run in the reverse direction to restablish equilibrium. C. Remain the same. Already at equilibrium. The concentration of CO will: A. Increase. B. Decrease. C. Remain the same
a 3.00 l helium balloon initially at stp floats up to an altitude of 10 km where the pressure is 200.0 torr and the
Calculate the volume of the acid solution needed to completely neutralize the base in the flask, 2.Calculate the pH for the initial base solution in the flask ;the point at which 20mL of the acid has been added
Propose a structure for a C6H15O2N compound that is unstable in aqueous acid and has the following NMR spectra: 1H NMR: ? 2.30 (6H, s); ? 2.45 (2H, d, J = 6 Hz); ? 3.27 (6H, s); ? 4.50 (1H, t, J = 6 Hz) 13C NMR: ? 46.3, ? 53.2, ? 68.8, ? 102.4
In the concentration range of 500 to 2000 ppm of U, there is a linear relationship between absorbance at 351.5 nm and concentration. At lower concentrations the relationship is nonlinear unless about 2000 ppm of an alkali metal salt is introduced ..
For each of the following unbalanced equations calculate how many moles of the second reactant would be required to react completely with 0.413 mole of the first reactant. Al + H20SO4 ----> Al2(SO4)3 + 3H2
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