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Redraw the Lewis structure using overlapping valence bonds enclosing pairs to show that carbon and nitrogen obey the octet rule.
at 298k 125 ml of 0.60 m potassium hydroxide koh is added to 175 ml of 0.40 m hydrochloric acid hcl. what is the final
Thomas Jefferson Snodgrass (Jeff1 found an unlabelled reagent bottle in his -80 oC freezer. The bottle contained a liquid. He found that the compound (compound I) quickiy evaporated when warmed to room temperature. 'H-NMR of the compound showed. o..
for the titration of 50.0 ml of 0.020 m aqueous salicylic acid with 0.020 m kohaq calculate the ph after the addition
A solution is 0.10 M AgNO3 and 0.10 M Ba(NO3)2. If solid Na2SO4 is added to the solution, what is [Ba2+] when Ag2SO4 begins to precipitate? (Ksp BaSO4 = 1.1 x 10-10; Ag2SO4 = 1.1 x 10-5)
Copper has two naturally occurring isotopes,63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope?
A 100.0ml of sample of drinking water was buffered at PH 10.0 and after the addition of Calmagite indicator, required 35.41ml of 4.652X10^-3 m EDTA to reach the end point for the titration. Calculate the total hardness of the water in ppm of CaCO3
using henderson hasselbalch calculate the ph of .5 L of 2.0M solution of nitrous acid, HNO2 that also contains 140g of nano2 (MM=70g/mol)
Consider the titration of a 25.0 mL sample of 0.100 M HC2H3O using 0.100 M NaOH as the titrant. Ka=1.8 x 10^ -5. Calculate the pH of the analyte after 10.00 mL of 0.100 M NaOH has been added. Use the Henderson-Hasselbalch equation.
Hydrocarbon mixtures are used as fuels. What mass of CO2 gas is produced by the combustion of 189.2 g of a mixture that is 57.6 % CH4 and 42.4% C3H8 by mass
What is the standard change in Gibbs free energy of this reaction at 25 °C. Hint: The equilibrium constant is related to the change in Gibbs free energy
It is assumed that the relative standarddeviation of the method is sr ? s = 4 ppt forcarbon and 6 ppt for hydrogen. The means of the reported resultsare 68.5% C and 4.88% H. At the 95% confidence level, is there anyindication of systematic error i..
what is the average density of the sun in units of grams per cubic centimeter? The volume of a sphere is (4/3)?^3.
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