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The genetic blueprint of all living organism on Earth is encoded by DNA. That makes the study of DNA and their interaction with the environment especially important.
To determine the possible interactions, you must first be able to recognize the functional groups that are present in a DNA structure. List all functional groups that are commonly found in uracil, guanine, cytosine, and tyrosine.
a chemical reaction occurs between solutions of rbcl and silver nitrate. this reaction produces a precipitate that is
Calculate the volume of carbon dioxide formed at a pressure of 2.50 atm and a temperature of 1250C.
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O
Problem- 1) Calculate the heat required to sublime of 940 g of solid CO2 at the normal sublimation temperature. Delta H = 24.2 kJ/mole
A student places 2.0 moles of methylamine in 500ml of water. what is the pH? the Kb of methylamine is 4.4x10^-4.
The minimum energy needed to eject an electron from a sodium atom is 4.41 * 10^-19 J What is the maximum wavelength of light, in nanometers, that will show a photoelectric effect with sodium
Question- What mass of sodium fluoride (MM 42.0 g/mol) must be added to 500. mL of a 0.20 M HF solution to give a buffer solution having a pH of 3.40? [pKa(HF) = 3.15]
An unknown acid is dissolved in water. The solution is divided into two equal parts and one part is titrated to a phenolphthalein end point with NaOH solution. The two solutions are then mixed and the resulting pH is found to be 3.25. What is the ..
A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact..
A sample of a gas occupies 1470 mL at 60.7?C and 740 torr. What volume would it occupy at the same pressure and 450?C.
The reaction below has the rate equation: rate=k min-1[C5H10Br2]. Given an initial concentration of C5H10Br2= .400 M and t1/2=2.25 hr, calculate the concentration of HBr produced after 35 min.
What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl? Kb of CH3NH2 = 3.7 10-4.
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