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Why is a voltaic cell created in two separate beakers?
A particular first-order reaction has a rate constant of 1.35 x10^2 s^-1 at 25 degrees Celsius. What is the magnitude of k at 75.0 degress Celsius if Ea= 85.6 kJ/mol
groundwater containing 60 mgl of co2 at 10oc is pumped through a spray nozzle aerator and the co2 concentration is
Why do primary alkyl halides undergo SN2 substitution reactions more rapidly than do secondary or tertiray alkyl halides?
what is thee sum of the charges on alanine aspartic acid and lysine? how did you find this answer?now design a
At 1 atm, how much energy (kJ) is required to heat 65.0 g of H2O(s) at -20.0 degrees C to H2O(g) at 135.0 degrees C?
An experimenter finds that she is unable to establish a premixed carbon monoxide flame when using an oxidizer composed of high-purity O2 (21%) and high-purity N2 (79%)
Given the following peptide: MPFITCYRVE What is the net charge on this peptide at pH 3 and pH 11. Use the pK values for the individual amino acids in Table 4.1. Estimate the pI (isoelectric point) for this peptide.
The atomic masses of ^10B and ^11B are 10.0129 amu and 11.0093 amu., respectively. calculate the natural abundances of these two isotopes. The average atomic mass of B is 10.811 anu
How many grams of sodium sulfate will be formed if you start with 200 grams of sodium hydroxide and you have an excess of sulfuric acid
A flask of water is connected to a powerful vacuum pump. When the pump is turn on, the water begins to boil. After a few minutes, the same water begins to freeze. Eventually, it disappears. Define what happens at each step
Aliquots of a 0.5-mg/mL standard of BSA are utilized to construct a standard curve for the Bradford protein assay. The tubes contain the subsequent amounts of the BSA solution: 0, 20, 40, 60, 80, and 100 μL. The corresponding absorbencies subseque..
The concentration of the alkane C20H42 (FM 282.55) in a particular sample of rainwater is 0.2 ppb. Assume that the density of rainwater is close to 1.00 g/mL
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