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You are seeking a pure preparation of a newly discovered enzyme, Xase, for further study. The assay for Xase has just been worked out, and you have a preparation of cells rich in this enzyme. Given the required equipment and supplies, how would you proceed
A compound contains 40.00% carbon, 6.67% hydrogen, and 53.33% oxygen. Determine the empirical formula of the compound. Give the chemical formula for calcium phosphate.
Change in internal energy E, At 25'C, enthalpy change H for the combustion of liquid octane, C8H8(l), to form CO2(g) and H2O(l) is -5471kJmol-1
If ocean consisted of 3.5% salt by mass,what would be the freezing point of the ocean? Assume the Density of H2O= 1.00g/ml and that the whole ocean would freeze at the same temperature everywhere.
Calculate the oxygen content of the plasma in mM! 1 ml plasma dissolves 24 uL oxygen at 38 degrees C if the partial pressure is 103 kPa.
Which of the following molecules or ions will have a lewis structure most like that of phosphorous trichlorid,
HCl according to the following chemical equation? MnO2+4(HCl) --> MnCl2 + Cl2 + 2(H2O)
The normal respiratory rate for a human being is 15.0 breaths per minute. The average volume of air for each breath is 0.505 L at 20.0°C and 9.95 x 104 Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters or..
find the percent composition of a compound that contains 1.94g of C, 0.48-g of H and 2.58-g of S in a 5.00-g S sample of the compound
What cell potential (V) would be expected under the following conditions?
Suppose that a 4.0 L sample of gas at 1.0 atm is heated from 44°C to 53°C, during this process the volume doubles. What will the final pressure of the gas sample be
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.
How much energy would be required to melt 74 g of HCl at its melting point of -110.8 ? C? ?Hfus for HCl is 14.2 cal/g and ?Hvap for HCl is 98.7 cal/g. Answer in units of cal.
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