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Two substances, a and b, have the same melting point. how can you determine if they are the same without using any form of spectroscopy? explain the physical/chemical reasons why your proposed method would work
Determine the amount of (NH4)2SO4 in g consumed in a fermentation medium in which the final cell concentration is 40 g/L in a 500 L medium volume
What is the rate law for step 2 of this reaction? Express your answer in standard MasteringChemistry notation. For example, if the rate law is type k*[A]*[C]^3.
A certain organic compound was burned, producing 1.481 g of CO2 and 0.303 g of H2O. The mass of the original sample was 0.438 g. What is the empirical formula of the compound?
calculate the pH of the 1 L solution of 0.25 M TRIS plus the addition of 0.05 M HCL. Show how many moles of TRIS and TRIS HCL are present after the addition of the HCL. Use the Henderson Hasselbalch equation to calculate the pH?
How many different tetrapeptides containing 2 molecules of alanine and 2 molecules of valine could theoretically exist?
Hospital patients are administered oxygen from an pressurized hyperbaric oxygen chamber. 600.0 L of oxygen is compressed in a cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at the given pressure.
what is the % mass of acetic acid in the vinegar? Hint: What is the mass percent of aceditc acid titrated and what is the definition of % mass?
A solution is prepared by dissolving 396g of sucrose (C2H22011) in 624g of water. What is the vapor pressure of this solution at 30 degrees.
Compare the release of S02 in the scrubbed flue gas (determined in Problem 14.6) with the EP A limit of no more than 520 nanograms S02 per joule of heat input to the boiler.
The vapor pressure of water at 29 ^circ rm C is 30.0 rm torr. What is the mass percentage of aluminum in this alloy?
Acetaldehyde decomposes at 750 K: CH3CHO â†' CO + CH4. The reaction is first order in acetaldehyde and the half-life of the reaction is found to be 530 seconds. What is the rate constant for the reaction at this temperature?
One molecular form of elemental sulfur is a ring of eight sulfur is a ring of eight sulfur atoms. As one molecule of this element is burned to make sulfur trioxide, how many oxygen molecules are used?
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