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Which of the following statements about enzymes is not true?
A. Enzymes are catalysts. B. Almost all enzymes are proteins. C. Enzymes operate most efficiently at optimum pH. D. Enzymes are destroyed during chemical reactions.
In plating the Zn onto the nail, it required 3.0v. If you were plating Ag onto the nail, do you think that 3.0v will work? If not, should the Ecell be higher or lower. Explain.
There are two stable isotopes of gallium. their masses are 68.9257 amu and 70.9249 amu. If the average atomic mass of gallium is 69.73 amu, what is the natural abundance of the lighter isotope
A 20.0mL sample of 0.20 M sodium acetate is titrated with 0.11 M HCL(aq). Explain what is the pH after the addition of 50.0mL HCl (aq). (Kb ofCH3CO2- = 5.6 ´10-10)
Elements from the alkali metals will combine in what ratio with the chalcogens. Covalent bonding is showing what type of interaction between electrons
if a compound has a molar mass of 156 gmol what is its molecular formula?if a compound has a molar mass of 88 gmol what
Define what is the Hrxn° for the reaction of an aqueous solution of lead(II) chloride with an aqueous sodium sulfate solution to make a precipitate of lead(II) sulfate Hrxn°= in kJ.
The resulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 10.13 mL of 0.08840 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.18 mL. Determine the percent WO3 in ..
Suppose that the silver-silver chloride electrode in Figure 15.2 is replaced by a saturated calomel electrode. Calculate the cell voltage if [Fe2+]/[Fe3+] = 3.2 multiplied by 10-3.
If a partially used battery contains 0.80 g of each of these four substances, for how many hours will the watch continue to run
Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you do the following
Show that Ka Kb = Kw for a weak acid and its conjugate base OR a weak base and its conjugate acid, using the equilibrium expression for each.
The intermolecular distance of CO is 113.1 pm. the molecular mass of 12C is exactly 12 g/mol. Explain the molecular mass of 16O is 15.995 g/mole. Find out the value of the rotational energy of 12C16O molecule described by J=0 and by J=1.
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