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When benzoic acid is partitioned between diethyl ether and queous sodium hydroxide solution and the aqueous layer is separated, acidification of the aqueous solution yields a precipitate.
What is the mass of a piece of aluminum that is found to displace 13.4 ml of water and has a density of 2.66 g/cm^3
Calculate the density of a piece of wood that is found to have a mass 2.34 g and is placed in a graduated cyclinder with 34 ml of water, which then rises to 50 ml with the block of wood
A non-volatile solute depresses the freezing point of cyclohexane by 4C. If cyclohexane has the formula C6H12 calculate the mole fraction of solute and solvent present in the solution.
Naphthalene has a relatively high vapor pressure for a solid (because of its volatility, naphthalene is the active ingredient in some brands of mothballs). In view of this, what might happen if you
Calculate the number of moles of carbon dioxide formed if 231 grams of calcium carbonate decomposes. CaCO3(s) ? CaO(s)+CO2(g)
3.47 Annual floods for a stream are normally distributed with a mean of 30,000 cfs and a variance of 1 x 106 cfs2. Determine the average return period Tr of a 32,000-cfs flood in the stream.
Disposable lighters burn butane (C4H10) and produce CO2 and H20. Balance the chemical equation for this combustion reaction and determine how many grams of CO2 are produced by burning 1.00 g of C4H1
Use the standard normal distribution in Table B.1 to determine the rain depth that would have a recurrence interval of 100 years. Use the same table to estimate the recurrence interval of the 1988 a
The probability that the annual peak will equal or exceed the median value in any single year. The average return period of the median value.
3.20 Existing records reveal the following information about events A and B, where A = a long March warm spell and B = an April flood. Are variables A and B independent. Prove.
Which protein(s) will bind tightly to CM Sephadex (a cation exchange resin) if loaded onto the column in a sample buffer whose pH is 7.0
Calculate the absolute error and relative error for each measurement made by the glucose monitor
The following names are incorrect. Please provide the correct IUPAC name. Molecule 1: tripropylmethane Molecule 2: 2,4-dimethylbutane Molecule 3: tritertbutylmethane
A sample of solid having a density of 4.88 g/cm3 had an apparent mass of 16.0886. The density of the balance weights is 8.00 g/cm3. Calculate the true mass of the object.
A process stream has 100 g/L NaCl in H2O. Prior to adding this to a batch bioreactor, the concentration must be reduced to 154 mM. The specific gravity of the solution is 1.075 at 20°C.
What volume in mL of concentrated nitric acid (72.0% HNO3 (w/w), sp. gr. 1.42) is required to prepare exactly 3.85 L of 0.330 M HNO3
A 500-mL volumetric flask containing 0.434 M KCl is emptied and allowed to drain briefly, leaving 1.14 mL of liquid in the flask. The flask is then rinsed by adding 87.5 mL of distilled water and is
what are some examples of situations where recrystallization would not be suitable to purify an organic compound
How tdo you rotate fischer projections to figure out if they are D/L configurations. I know the difference between D/L but unsure of how to rotate them! Please you examples of D/L-Alanine
The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant. N2O4(g) + 2 NO2(g)=1.46
What is the molarity of I2 when 5.00g of iodine is dissolved in enough dichloromethane to make 50.0 mL of solution
Using a biuret assay, the following set of data has been obtained. Using a graph, determine how much protein is in your sample. Sample 0 mg albumin 10 mg albumin 25 mg albumin 50 mg albumin 75 mg al
Ranked the free energy changes for hydrolysis of these phosphorylated compounds from the most negative (on the left) to the most positive (on the right)
You have a 1.0 mL sample of unknown concentration that requires 8.0 mL of titrant to change the color of the solution. How many mg of ascorbic acid are in your unknown sample