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Strontium 90, radioactive isotope, is a main product of an atomic bomb explosion. It has a half-life of 28.1 yr. (a) Compute the first-order rate constant for the nuclear decay.
nitrogen fixation in the root modules of peas and other leguminous plants is carried out by the molybdenum-containing
Explain how alkene/aromatic C-H stretches are distinguished from alkane C-H stretches. Do the C-H stretch peaks in the IR spectra of triphenylmethanol, bromobenzene and benzophenone occur in the expected alkene/aromatic C-H stretching region
Consider 1.00 L of air in a patient's lungs at 37.0 C and 1.00 atm pressure. What volume would this air occupy if it were at 25.0°C under a pressure of 5.00* 10-2 atm (a typical pressure in a compressed air cylinder)?
A rate constant obeys the Arrehnius equation, the factor A being 2.2 * 10^13 s-1 and the activation energy being 150 kj mol -1. What is the rate constant at 227 C, in s-1
explain the advantages and disadvantages of using high gold content bonding alloys when constructing bonded porcelain
The Wittig reaction involves coupling between a phosphonium ylide and a carbonyl-containing molecule. If a chemist wants to use the Wittig reaction to synthesize 2-methyl-2-butene, which reactants should be used?
A 23.7-g sample of ethylene glycol, a car radiator coolant, loses 906 J of heat. What was the initial temperature of the ethylene glycol if the final temperature is 32.5 degrees Celsius (c of ethylene glycol=2.42 J/g*K)
a 30 g sample of water at 280 k is mixed with 50 g of water at 330 k. calculate the final temperature of the mixture
Estimate the solubility of silver iodide in pure water at 25 degrees Celsius (a) in moles per liter and (b) in grams per liter.
calculate the amount of heat requred to raise the temperature of 100.00 g of Mercury at 0.0000 c to 2.0000 c. repeat for 99.000 c to 101.000 c
determine what concentration of oh - is needed to dissolve 0.015 mol ofnbspznoh2 zinc hydroxide in a liter of solution
draw the lewis structures and determine which of these molecules has a central atom that violates the octet rule.
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