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In the double stranded helix structure of DNA, which bases are always hydrogen bonded to the following: cytosine, thymine, adenine, and guanine?
The pK value of the system is 6.1. If the [CO2] is expressed in terms of partial pressure and equals 1.3kPa and the bicarbonate concentration is 2.2 x 10^-3 M, what is the pH of the solution.
The temperature of the water and that of the gas are identical at 26oC. how many moles of helium have been evolved.
It was originally part of my ebook EVERYTHING YOU NEED TO KNOW ABOUT CHEMICAL NOMENCLATURE. If you want more information or a more complete description to include inorganic compounds please see the ebook section of this website.
At 580 nm the wavelength of its maximum absorption, the complex FeSCN2+ has a molar absorptivity of 7X10^3 L cm-1 mol-1 calculate
A pure titanium cube has an edge length of 2.71in How many titanium atoms does it contain. Titanium has a density of 4.50 g/cm^3
How does concentrated H2SO4 catalyze the esterfication reaction of ethanol and acetic acid to form ethyl acetate. Explain.
Consider the arrangement of bulbs shown in the drawing. Each of the bulbs contains a volume of gas as shown. PN2 = 700. torr, PNe = 206 torr, and PH2 = 402 torr. What is the pressure of the system when all the stopcocks are opened, assuming that t..
What isthe pressure inside of the cylinder in kilopascals at 20 degrees C
The linear molecule FeH2 has been observed in the gas phase. Assume that the iron atom can potentially use s, p, and d orbitals to interact with the hydrogens. If the z axis is collinear with the molecular axis
What is the molarity (M) of a solution that contains 2.08 grams of NaOH (MM = 40.00 g/mol) in 79.65 mL of solution.
Calculate the ph at the equivalence point for the following titration 0.20M HCl versus 0.20M methylamine (CH3NH2). The Ka of methylammonium is 2.3x10^-11.
Pure water containing no arsenic was spiked with .40micrograms arsenate/L. Seven replicate determination gave .39 ,.40, .39, .41, .36, .35,.and .39 microgram/L. Find the mean percent recovery of the spike and the concentration detection limit
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