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The SI unit of time is the second, which is defined as 9,192,631,770 cycles of radiation associated with a certain emission process in the cesium atom. Calculate the wavelength of this radiation
Consider the combustion of methanol: 2 CH3OH(g) + 3 O2(g) 2 CO2(g) + 4 H2O(g). If CO2 is produced at the rate of 0.8 mol/s, what is the rate of consumption of O2?
If you wanted to make a 3 liter solution of 500 mM formic acid buffer at ph 3.9 how many grams each of sodium formate (MW=68g/mol) and formic acid (MW=46g/mol) would you add... 98.6 g sodium formate and 2.3g of formic acid or 20.2 sodium formate
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.400 M. N2(g)+O2(g) 2NO(g) If more NO is added, bringing its concentration to 0.700 M, what will the final concentration of NO be after equilibrium is r..
Using the balanced equation: 2NaCl(s)+ 1H2SO4(aq)= 2HCl(aq)+1Na2SO4(aq) a. If 20. G of NaCl are used, and only 5.6 g of HCl are isolated, what is the percent yield of HCl? b. If only 5.6 g of HCl are obtained, how many grams of Na2SO4 must also ha..
Determine how many grams of oxygen gas would be needed to combine exactly with 13.2 kg of propane (C3H8) gas (the 3 and the 8 are subscripts).
A 0.250g sample of citric acid dissolved in 25.0 mL of water requires 37.20 mL of 0.105 M NaOH for complete neutralization. What is the molecular formula of citric acid?
Write out the balanced overall equation for the redox reaction that could occur between these species. An electric current would have to have what minimum potential to force the reaction forward?
If the gas was not pure butane but 10 mole percent propane and 90 mole percent butane then determine how would the MW value be affected?
Calculate the bicarbonate and carbonate alkalinities, in mg/L as CaCO3 , of a water having a total alkalinity of 233.0mg/L as CaCO3 and a ph of 10.47?
Calculate the Gibbs free energy change of transformation at 286 K and 1 atm. Tin transforms from gray tin to white tin at 286 K and constant pressure of 1 atm. The following data are given for both gray and white tin:CP = 21.6 + 18.2 x 10-3 T
An aerosol can has a gas pressure of 133 kPa at 293 K. Calculate the pressure when the can is heated to 460 K.
A 0.24ml sample of a weak acid with an unknown pKa was combined with 12.0ml of a 3.20M KOH and the resulting was diluted to 1.500L. The measured pH of the solution was 3.75. What is the pKa of the weak acid
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