What is the weight percent fe in the sample
A mixture weighing 27.73 mg containing only FeCl2 (FM 126.75) and KCl (FM = 74.55) required 18.49 mL of 0.02237 M AgNO3 for complete titration of the chloride. What is the weight percent Fe in the sample?
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A certain molecule fluoresces at a wavelengh of 400 nm with a half life of 1.0ns. It phosporesces at 500 nm. If the ratio of the transition probabilities for stimulated emission for the S*-->S to the T-->S transition is 1.0 x 10^5.
A stick of mass m and length 2r is arranged to make a constant angle theta with the horizontal, with its bottom end sliding in a circle on a frictionless ring of radius r. What is the frequency of this motion? It turns out that there is a minimum
Bones are recovered from an ancient camp site. They emit 452 cpm(counts/min). Current carbon containing materials measure at 1430 cpm. What is the age of the bones?
A 38.0 kg child swings in a swing supported by two chains, each 3.00 m long. (a) If the tension in each chain at the lowest point is 356 N, find the child's speed at the lowest point.
The Saturn V, developed at NASA Marshall Space Flight Center (MSFC) under the direction of Wernher Von Braun, was the largest in a family of liquid-propellant rockets that solved the problem of getting to the moon. A total of thirty-two (32) Satur
A shipment of 30 USB drives contains 5 that are defective. A sample of 10 of the drives is taken. Find the probability that this sample contains (a) Exactly 1 defective USB drives. (b) At most 1 defective USB drive. (c) Write out the probability m
A plane flying on a heading(use bearing) of 60 degrees at 150km/h is four hours from it's destination (600km). The plane experiences a 50km/h headwin out of the Northeast at 60 degrees for the next four hours. a. Determine the actual speed and dir
A 15.0 cm cube of sodium metal (density = 0.968 g/ml) is thrown into an acidic lake equivalent to a buffer of 5.00 x10-4 M acetic acid and 8.00 x10-4 M sodium acetate.
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