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A stock solution is 2.567 M in NaBr. A dilution is made by diluting 25.00mLs of the stock solution to a new volume of 1.500 liters. Explain how many grams of NaBr are present in the diluted solution?
in standardizing a solution what would happen if instead of putting hcl solution into a buret and standardized naoh
a 255- flask contains pure helium at a pressure of 754 . a second flask with a volume of 470 contains pure argon at a
the amino acid glycine is often used as the main ingredient of a buffer in biochemical experiments. the amino group of
Investigators have reported experimental observation of the He2 ‘complex' (i.e., a very weakly bonded molecule). The fact that the observation required temperatures in the neighborhood of 1 mK is consistant with computational studies that hcDe for..
The temperature of 2.50 moles of an ideal gas increases from 13.5'C to 55.1'C as the gas is compressed adiabaticaly. Calculate q,w,deltaU and deltaH.
How many moles of CO(NH2)2 are present in 105 g of water, if the freezing point of the solution is -4.02C? kf(water) = 1.86 K · kg/mol.
You have 200ml of a solution which is 0.2M NH3 and contains 0.23grams of NH4Cl. a. What type solution is it. b. What is the pH of the solution
A buffer solution of a weak base and its salt had a pH of 5.26 when the base was 0.123 M and the cation was 0.747 M. Calculate the equilibrium dissociation constant (Kb).
Consider the dimerization 2A to A2, with forward rate constant ka and backward rate constant kb. (a) derive the following expression for the relaxation time in terms of the total concentration of protein
Calculate Equilibrium constant, if delta Gf for NH3(aq) is -26.50 kj/mole; for H2O(l) is 237.13 kj/mole;for NH4+(aq) is -79.31 kj/mol; for OH-(aq) is 157.3 kj/mole. How many moles of NH4Cl must be added to 1.0L of 0.10M NH3 to make a buffer whose ..
Compute how many active Raf kinases will be produced in three seconds after activation of PTK in the absence GAP. Presume that Ras hydrolyses GTP with the rate of 2 molecules/min in the absence of GAP
an object with a constant pressure heat capacity of 200 jk is removed from a boiling water bath and allowed to cool to
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