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Suppose that the dot/area representing the shortest wavelength of color was located 26 mm from the baseline. If the solvent traveled 42 mm from the baseline, what was the Rf for the sample?
What is the pH at the equivalence point in the titration of a 18.7 mL sample of a 0.478 M aqueous acetic acid solution with a 0.370 M aqueous barium hydroxide.
can a liquid be identified by the same principl(e.g. mixing an unknown liquid with known liquid) and determining if the boiling point of the mixture is depessed if the two liquids are different?
You are titrating 50.00 ml of unknown concentration of HNO3 with 0.487 M lithium hydroxide. You add 25.34 ml of lithium hydroxide to reach the neutralization point. Write the neutralization reaction: What is the pH at the neutralization point. wha..
separate a mixture of alkane. which HPLC mode you will choose and why? ( Consider Normal-phase, ion- exchange, and size-exclusion).
Calculate q, w, ?E, and ?H for the process in which 80.0 g of nitrous oxide gas (N2O) is cooled from 162°C to 53°C at constant pressure of 5.00 atm. (See Table 9.1.) N2O Cv J/K mol = 30.38 Cp J/K mol = 38.70
Is there enough energy in a Bic lighter (5 g of butane) to heat the water in a 500 ml water bottle to boiling? Assume the water is initially at 25 C. Is this also enough energy to boil all of the water? Assume water is 1g/ml. If not, how many ligh..
What is the molarity of a solution prepared by dissolving 10.5 grams of NaF in enough water to produce 750 mL of solution
calculate the formal charge on the indicated atom in each of the following molecules or ions. some molecules may have
The Ag+ ion is larger is a square planar environment than it is in a tetrahedral one. For Ni2+ the reverse is true. Explain.
What is the pH of a solution of 0.700 M K2HO4, potassium hydrogen phosphate. What is the pH of a solution of 0.450 M KH2PO4, potassium dihydrogen phosphate
You are expected to design a car that works with photovoltaic panels. Assume that the driver is 75kg and the expected speed is 50km/hr.
In the following problem you must: 1) Determine the correct formula for each reactant and product. 2) Determine the correctly balanced chemical equation. 3) Us the stoichiometry of the chemical equation to answer the questions regarding yield of..
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