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The mass spectrum of a compound that contains two bromine atoms gives isotope peaks with relative intensities of 1:2:1 for the M, M+2 and M+4 peaks, respectively. Explain why.
Use the same reasoning to determine the relative intensities for the M, M+2, M+4, M+6 and M+8 peaks of a compound that contains four bromine atoms.
hemeagglutinin (HA) for sialic acid is low, Kd of ~ 5nM, how can efficient attachment occur with such a low affinity interaction?
How can you distinguish chemically between starch and three other carbohydrates (sucrose, glucose, & lactose)? What would you expect to observe when adding one drop of iodine-potassium iodine reagent to each of the four carbohydrates?
If the atmospheric pressure at 30 km is 28.0 torr and the temp is -48 C, what is the volume of the balloon when it bursts?
How many electrons are transferred in the following oxidation-reduction reaction?
A 347 ml sample of solution contains 5.1 g of CaCl2. Calculate the molar concentration of chloride ion in this solution
A beaker containing 250 mL of a 0.500 M solution of acetic acid COOH) is added to 125 mL of a 0.850 M solution of sodium carbonate. The reaction that ensues produces carbon dioxide, sodium acetate COONa), and water. How many grams of carbon dioxid..
Consider the steel tank whose volume is 42.0 L and which contains oxygen gas at a pressure of 18,000 kPa at 23° C. What mass of oxygen does the tank contain?
How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely.
If a cylinder of NO has a volume of 20.00L and a pressure of 26.98 atm at 20 degrees Celcius, what is the mole fraction of NO knowing that there are 21.55moles of Nitrogen?
1)WhenH2(g)reacts withC2H4(g)to formC2H6(g),137kJ of energy areevolvedfor each mole ofH2(g)that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.
Why is this isolation so difficult? Please explain using the isoelectric point and the effect PH will have on the structure of your product
For a given reaction, the reaction forms predominantly products at equilibrium (i.e. it essentially goes to completion). Which of the following represents a reasonable value for K
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