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DNA structure, called the i-motif can be formed from sequences containing stretches of cytosine (C) residues. In this structure protonated C forms a noncanonical base pair with anunprotonated C. A pH titration of the formation of the i-motiffolded structure shows a sharp transition around pH 6.5. Draw the C-C base pairs found in i- motif. Explain the structural change at pH 6.5.
water to give a solution that has a vapor pressure of 37.2 torr at 35 °C? Assume complete dissociation of the solute and ideal solution behavior
A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass. What is the partial pressure of krypton in the mixture if the total pressure is 884mm Hg
Copper (II) oxide can be reduced to copper metal by heating in a stream of hydrogen gas:CuO(s) +H2(g) -heat--> Cu(s) +H2O(g)
Which of the following is a neutralization reaction?
a calculate pcunbspfor the titration of 10.00 ml of 0.05000 m of i-nbspwith 0.02500 m cunbspstandard solution when
calculate the mass in kilograms of 3.99 liters of acetic acid. the density of this substance is 1.05g/mL ?
Assuming that a neutron star has the same density as a neutron, calculate the mass (in kg) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.20 mm.
An astrophysicist working at an observatory is interested in finding clouds of hydrogen in the galaxy. Usually hydrogen is detected by looking for the Balmer series of spectral lines in the visible spectrum. Unfortunately, the instrument that dete..
1. Commercial hydrochloric acid, HCl, is 12.0 molar. Calculate the mass of HCl in 250.0 mL of the solution. 2. Why do sugar cubes dissolve more slowly. than granulated sugar in water.
The mass percent composition of the compound is 53.31% C, 11.19% H, and the rest is O. What is the molecular formula of the compound
a tank with a total pressure of 4.7 atm has a mixture of gases that is 72 nitrogen and the rest is oxygen. what is the
acetylene gas c2h2 is produced as a result of the reaction cac2s2h2ol-gt c2h2gcaho2aq if 13g of cac2 are consumed in
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