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An aqueous solution is made by adding 50mL of 4.0 M NaCN to 30mL of 5.0 M HCN. Compute the pH of the solution.
The average atomic mass recorded on the periodic table for cobalt is 58.933 u. This indicates that the most abundant isotope of cobalt is. A newly discovered element, X, has two naturally occurring isotopes. 93.5 percent of the sample is an isotop..
What is the minimum number of conversions that need to be done across a peak to achieve a reproducibility (relative standard deviation) of less than 1% for repeated measurements of the same peak
Use the molar bond enthalpy data in the table to estimate the value of change in H rxn for the equation: CCl4(g) + 2F2(g) yields CF4(g)+ 2Cl2(g). Average Molar bond enthalpies
For the endothermic equilibrium CaCO3(s) + NH4+(aq) + SO42+(aq) -> CaSO4(s) + NH3(g) + HCO3-(aq), explain the best set of changes to apply in order to increase product yield effectively.
Calculate the pressure exerted by Ar for a molar volume of 1.04L/mol at 475K (a) the ideal gas law and (b)using the van der Waals equation of state. The van der Waals parameters a and b for Ar are 1.355 bar dm^6/mol^2 and 0.0320 dm^3/mol, respecti..
what is the energy uncertainty associated with a short pulse of laser light that lasts 4.8fs
A compound was analyzed and found to contain 40.00% carbon, 6.72% hydrogren, and 53.25% oxygen with a molar mass of 180.0 grams.
What types of intermolecular forces would you expect to exist among molecules of 1-butanol? (Select all that apply.)
The entropy increase after mixing 2 moles of oxygen 1 mole of nitrogen, which were prepared at the same pressure and temperature, is (in J/K). (Pretend oxygen and nitrogen are ideal gases)
For the reaction PCl5-> PCl3+Cl2 kp= 26.03 at 800K. calculate the equilibrium partial pressure for the reactant and product if the initial pressures are PPCl5= .54 atm and PPCl3= .37 atm.
Predict the coordination number in a NiS crystal. The ionic radii for Ni+2 and S-2 are 0.069 and 0.184nm, respectively.
C2H5OH(l) + C3H7COOH(l) C3H7COOC2H5(l) + H2O(l) Determine the mass of ethyl butanoate produced if 3.30 mol of ethanol is used.
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