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Explain what is the net charge of this peptide at pH 6 and how? Glutamic acid-Leucine-Histidine-Arginine-Asparagine-Threonine-Aspartic acid
Compute the mass of CO2 produced in the combustion of 15 gallons of gasoline. Presume that gasoline consists of octane (C8H18), and has a density of 2.65 kg/gallon.
Calculate the number of photons emitted in one second by a 13 W laser operating at a wavelength of 400.0 nm. photons
The percent composition by mass of a compound is 76.0% C, 12.8% H, and 11.2% O. the molar mass of this compound is 284.5 g/mol. Explain what is the molecular formula of the compound
An unknown element, X, reacts with chlorine to form a compound with the formula XCl2. Which element is most likely to be element X?
Assume that an esterification reaction is done using 0.10 moles of a carboxylic acid and 1 moles of an alchohol. What is the theoretical yield (in moles) for the reaction
In the reaction between butanal and propanal, two different aldehydes are used and thus four different aldol addition products can be formed (which makes this an undesirable route for making aldols). Depict the skeletal structure of the aldol addi..
Melting point of a mixture A + B was measured to be higher than any of the melting points of pure individual components A and B. When this might be the case
When boron triflouride is added to ammonia gas, does boron triflouride act as a lewis acid or a lewis base?
a) Use Planck's equation (E = hv) to determine the energy, in kilojoules per mole, of radiation of frequency 2.12×10^14 (s^-1). b) What electron transition in a hydrogen atom, starting from the orbit 10, will produce light of wavelength 380 nm
Indicate whether the pH is equal to 7, greater than 7, or less than 7 at the equivalence point for the following titrations at 25oC. a) HF + LiOH
State all of the allylic radicals and their resonance structures that are formed during the propagation step for the below reaction.
Amphetamines in urine can be confirmed by mass spectroscopy at a concentration of 500 ng/mL. Assuming a urine density of 1.025 g/mL, what is this concentration in parts per million
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