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Question: Covalent modification of enzymes is an important means of regulation. Explain the steps by which phosphorylation decreases the rate of formation of pyruvate from phosphoenolpyruvate in the Liver.
Hydrogen chloride gas can be prepared by the following reaction: 2NaCl(s)+H2SO4(aq) 2HCl(g)+Na2SO4(s) How many grams of HCl can be prepared from 2.00 mol H2SO4 and 150g NaCl.
HEPES are synthetic amine compounds that are often used to make buffers for biochemical studies. What is the pH of a 1.0 L buffer solution that is 0.250M HEPES
a solution contains 4.64g kcl in 178 ml of solution. the density of the kcl solution is 1.14 gml. what is the molarity
question a 25.00-ml sample of an unknown h3po4 solution is titrated with a 0.100 m naoh solution. the equivalence point
Calculate the pH of the resulting solution after the following volumes of HNO3 have been added. (e) 50.0 mL (f) 100.0 mL Show the work please
how many grams of sodium chlorida are in 100 ml of water if the vapor pressure of the solution is 630 torr 20 c? given
What volume of a concentrated HCL, which is 36.0% HCL by mass and has a density of 1.179g/mL , should be used to make 5.10 L of an HCL solution with a pH of 1.5
The metal hydride LiH has a density of 0.77 g/cm3 . The edge of the unit cell is 4.086 . If it is assumed that the H ions define the lattice points, does the compound have a face-centered cubic or a simple cubic unit cell?
1. Why was excess dry ice used in step 3 of the procedure? 2. Why do gas laws use degrees Kelvin rather than degrees Celsius? 3. Were you surprised at how accurately the mass of a molecule of CO 2 could be determined With such simple equipment?
when ethane c2h6 reacts with chlorine cl2 the main product is c2h5cl but other products containing cl chlorine such as
The freezing point of an aqueous solution containing 15 g of a nonelectrolyte in 150 mL water is -5.4°C. What is the molecular weight of the compound? Kf = 1.86°C/m for water.
A certain metal oxide has the formula MO where M denotes the metal. A 36.46g sample of the compound is strongly heated in an atmosphere of hydrogen to remove oxygen as water molecules.
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