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1.The enzyme pyruvate dehydrogenase which converts pyruvate to acetyl COA can be activated by phosphorylation or dephosphorylation. this would be an example of which one : allosteric regulation, substance-level phosphorylation, oxidative phosphorylation, saturation, or covalent regulation.
2. A 1.994-g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4 is heated at a temperature greater than 170 C in a crucible until a constant mass is reached. The mass of the anhydrous CaSO4 salt is 1.577 g.
Calculate the percent by mass of water in the hydrated
Calcium sulfate salt.
1.a pepsin of 3 grams get dissolved in water and formed a solution of 10.00 ml it was found that the osmotic pressure
How do we know the oxidation of camphor leads to a different product if they look/smell the same in the end as it did in the beginning?
Hard water contains Ca2+, Mg 2+, and Fe2+. Water softeners replace these ions with Na+. If 1.0 X 10^3L of hard water contains 0.010 M Ca2+ and 0.0050 M Mg2+
A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per atom) for the new element are l1 = 0.507, l2 = 1.017, l3 = 4.108, l4 = 5.074, l5 = 6.147 l6 = 7.903, l7 = 8.294. To wh..
In acid solution, ethanol forms diethyl ether (C4H10O): 2 C2H6O --> C4H10O + H2O If 50.0 g of ethanol yields 33.9 g of diethyl ether, what is the percent yield for the reaction
Large jumps in ionization energy tend to occur whenever the removal of that electron disrupts an electron configuration ending in
It was determined from six replicates measurements that a candlewick contained 12.1 ppm lead and the standard deviation was 0.6ppm. assuming no systematic errors, the true means is likely to lie between what values at 95% confidence
a sample of 4.47 grams of a molecular compound is that dissolved in 96 grams of tetrachloromethane ccl4. the normal
The volume of 350. mL of gas at 25°C is decreased to 135 mL at constant pressure. What is the final temperature of the gas?
Calculate the wavelength of the light that is absorbed for the electron's transition from n = 5 to n = 6 in Be3+ ion. (ans in nm.)
An experiment requires 45.0 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
for the reaction 2nog2h2g-gtn2g the rate law is ratekno22h2 where the rate constant is 130 m-2s-1. evaluate the rate
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