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A bioengineer preparing cells for a cloning experiment bathes a small piece of rat epithelial tissue in a TRIS buffer, (HOCH2)3CNH2. The buffer is made by dissolving 34.0 g TRIS (pKb = 5.91) in enough 0.075 M HCl to make 1.00 L of solution.
a) What is the molarity of TRIS?
b) What is the pH of the buffer?
you need to titrate 38.2 ml of an acetic acid solution ch3cooh. acetic acid is a monoprotic acid. you begin your
A 0.0560 g quantity of acetic acid is dissolved in enough water to make 50.0 mL of solution. Calculate the concentration of H+, CH3COO-, and CH3COOH at equilibrium. Ka for acetic acid= 1.8x10^-5.
Using Le Chateleir's principle, explain the effect on teh cell potential of decreasing the Fe2+ ion concentration from 1.0M to 0.1M for each of the following reactions. The concentration of the other solution remains at 1.0M.
A lab rat weighs 265 grams and absorbs 1.67*10^13 beta particles eash with an energy of 2.2*10^13u. If relative biological effectiveness is .75 what is the dose. a)1.04*10^-2 sV b)1.3*10^-2 sV c)1.04*10^-5 sV d) 1.39*10^-5 sV e)6.23*10^-13 sV
What is the maximum number of orbitals that can be identified by each of the following sets of quantum numbers?
Calculate the equilibrium constants of the dissociation and the standard enthalpy of dissociation at the mean temperature.
What mass of sucrose should be combined with 549 g of water to make a solution with an osmotic pressure of 9.00 atm at 280 K? (Assume the density of the solution to be equal to the density of the solvent.)
carbon aldoses are there in the L-series? Enter just the numerical value, expressed as a whole number.
A solution of a weak acid, HA, is prepared by dissolving 4.8 mmol of HA in 10.0 liters of a solution.The following values of absorbances were measured in a 1.0 cm cell in various buffers.
A 0.481 gram sample of an unknown acid (HX) required 28.95 mL of 0.2013 M NaOH for neutralization to a phenolphthalein endpoint. What is the molar mass of the acid
show the calculation for the percent yield of K3[Fe(C2O4)3].3H2O using your actual yield and the theoretical yield
traditionally foreign direct investments fdi has followed foreign trade since foreign trade is typically less costly
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