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During a chromatography experiment, a student calculated two Rf values. They are A: .62 and B: ,30. The solvent front for the original chromatogram was 12.0 cm. If A and B were run on a second chromatogram and the solvent front was 25.0 cm, how far apart would A be from B?
A certain shade of blue has a frequency of 7.12 × 1014 Hz. What is the energy of exactly one photon of this light
Why does transferring a F-C Acylation Reaction (ie/ toluene and acetyl chloride reaction) to HCl/ice quench the reaction?
what is vapor pressure in mmhg of a solution prepared by dissolving 5.00 g of benzoic acid in 100g of ethyl alcohol at 35 degrees celcius? the vapor pressure of pure ethyl alcohol at 35 degrees if 100.5 mmHg
Calculate the cell potential for the following reaction as written at 61 °C, given that [Cr2 ] = 0.826 M and [Ni2 ] = 0.0200 M. Cr(s) + Ni ^2+ (aq) --> Cr^2+ (aq) + Ni(s)
How much heat is required to warm 223 g of ice from -45.3°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
Calculate %wt of C, H, and O in the compound and find the empirical formula of this compound - What is the weight percent of Cl
what is the molality of ethanol in a solution made by dissolving 14.6g of ethanol, C2H5OH, in 53.6 g of water?
If a sample of 0.230 grams of KCN is treated with an excess of HCL, calculate the amount of HCN formed, in grams.
Which of the following atoms is least likely to form an ion. A) fluorine B) magnesium C) silicon D) sodium 2.For which of the following atoms do we not try to apply the octet rule? A) oxygen B) nickel C) sodium D) xenon
what is the freezing point of a solution of 1.17 g of 1-naphthol c10h8o dissolved in 2.00 ml of benzene at 20degc? the
Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate this pH
what is the q solution in Jouls and what is the q rxn in Joules? What is the Delta H rxn in KJ/mo of HNO3 neutralized?
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