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What color is lithium sulfate and lead chloride. Also are they soluble in water and alcohol? Are they flammable?
The pyrene excimer emission spectrum at a (higher/lower/same) wavelength than (as) the excited pyrene fluorescence emission spectrum. Explain.
Suppose that a hotplate transfers 325KJ of energy to 450g of liquid water at 20C. What mass of the water would be boiled away
To determine the freezing points of distilled water, 1m glucose, 1m NaCl, 1m CaCl2. Use the freezing point of the pure water as a baseline to determine deltaTf for each of the solutions
Predict the products likely to be formed via the anti- addition of Br2/acetic acid to trans- cinnamic acid. • What is the predicted m.p. of the brominated product(s) you prepare via this method
Hemoglobin has a positive charge of +5 and a radius of 3.55 nm in water. How far will the protein travel in one hour in an electrophoresis gel at 25C when a field of 1.0 V cm^-1 is applied if the viscosity of the gel is 0.891 cP
a) how many moles of sulfur are in 23.2 g of (C3H5)2S, b) how many atoms of hydrogen are in 0.75 mol of (C3H5)2S, c) how many grams of carbon are in 4.20 x 10^23 molecules of (C3H5)2S, d) how many atoms of carbon are in 15.0 g of (C3H5)2S
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 ? 10-5 for benzoic acid]
the resulting solution required 38.10mL of 0.08765M AgNO3(aq)to precipitate the Cl(aq) and BrCl(s)and AgBr(s) calculate the mass percetage of NaCl(s)in the mixture
If both enzymes catalyze their reaction with similar rates, explain why the hydrolysis of the starch molecule is accelerated when both enzymes act together.
Determine the molar solubility of CuCl in a solution containing 0.050 M KCl. Ksp (CuCl) = 1.0 × 10-6. Answer A. 1.0 × 10-12 M B. 5.0 × 10-7 M C. 2.0 × 10-5 M D. 1.0 × 10-3 M E. 0.050 M
N2 is .070 moles, O2 is 0.35 moles and CO2 is 0.20 moles, the total is pressure 1.55 atm what is the pressure of N2?
If CO2 is not removed by boiling after the addition of HCL, how will this affect the determination of moles of base per gram of antacid tablet?
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