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Assuming that the loss of ability to recall material is a first order process with a half- life of 45 days for the traditional(talking head lecture) and a half-life of 285 days for the modular approach, calculate the number of days required to forget 95% of the material learned by each method. Assume a constant temperature and no further reference to the learned material during the decay time.
Teaspoon of salt weighs about 5g and contains 2,300mg of sodium. Determine the amount of sodium that has been actually been added, in grams.
One enzyme under study in a is peptidylglycine alpha-amidating monooxygenase (PAM). The molecular weight of monomeric PAM is 75,000 g/mol and the enzyme contains 2 copper atoms/enzyme molecule.
What was his wavelength at his average speed, if he weighed 207 lbs at the time of the race?
An aqueous solution containing 35.5 g of an unknown molecular (nonelectrolyte) compound in 156.3 g of water was found to have a freezing point of -1.4C. calculate molar mass of unknown compound
A metal sulfide, M_2(CO_3)_3, has a K_sp of 5.35*10^-42. What is the molar solubility of this sulfide in water. Assume the sulfide behaves ideally
How many liters of the antifreeze ethylene glycol [CH2(OH)CH2(OH)] would you add to a car radiator containing 6.50 L of water if the coldest winter temperature in your area is -20°C?
The enthalpy of combustion of methane, Ch4, is -890 KJ/mol. If the gas flow rate of the methane to the burner of a stove is 5 L/min at 25 degrees celsius and assuming complete heat transfer from combustion
a balloon filled with 39.1 mole of helium has a volume of 876l 0.0oc and 1.00 atm presssure. the temperature of the
what are the structural formulas for the following compound : 6-bromo-2-methyl-3-heptyne
The inital temp of the water was 25.2 degree c. At equilibrium the temp of the water and metal was 30.4 degreec -what was the change of temperature in the water
If 545 mL of oxygen gas is collected at 21ºC and 754 mm Hg, what is its volume at STP?
CH3OH burns in oxygen (O2) to from carbon dioxide (CO2) and water(H2O). Equal masses of ten grams of gaseous CH3OH and O2 are placed in an evacuated flask of five litres at the temperature of 25 degrees celsius.
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