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What is the overall charge state for the tetrapeptide DREAM at physiological pH. The pK values for N-terminal, C-terminal, side chain of asp, arg, glu are 9.0, 3.5, 3.9, 12.5, and 4.1, respectively
Note: Dream is the sequence of Asp-Arg-Glu-Ala-Met
How much heat is required to warm 215 g of ice from -44.1°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
If a 190 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.21.0 , what is the average thickness of the sheet in meters?
The heats of reaction for the following combustion reactions were determined experimentally
What is the value of the equilibrium constant for the cell reaction below at 25°C? E°cell = 0.30 V
Explain why the rates of diffusion of nitrogen gas and carbon monoxide are almost identical at the same temperature.
Empirical and Molecular Formulae, The analysis of an organic compound produces the following elemental analysis: % C is 59.999% and % H is 4.476%.
Nitrogen is contained in a 300 ml vessel at 400 mm Hg and 10°C. How many grams of nitrogen are in the vessel?
of 2.60 cm^2.if solar radition is 1150 W/m^2, how many photons strike the leaf every second.
A solution containing 3.47mM X (analyte) and 1.72 mM S (standard) gave peak areas of 3473 and 10222, respectively, in a chromatographic analysis. Then 1.00ml of 8.47mM S was added to 5.00ml of unknown X, and the mixture was diluted to 10.0ml. This..
Calculate the molecular rms speeds of He atoms at 10, 100, 1000 K in units of meters per second and miles per hour.
Determine which species is present in the lowest concentration in 0.10 M H3A solution?
Assume also that on a yearly basis the lake is completely mixed, and that the small river flowing into and out of the lake can be neglected as far as acidification is concerned. How many years will it be before the lake will reach a pH of 5.0?
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