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chemistry
1. The best means of personal protection from radiation for emergency responders is the implementation of three basic principles: time, distance, and shielding. Using the Inverse Square Law of radiation, what Geiger counter reading would you get for a radioactive material when you are four feet from the source (assume an initial reading of 6300 R at a distance of 1 foot from the source)? __________ R. 2. Selenium-75 is used in medicine to assist in diagnosing pancreatic cancer and decays solely by electron capture. The product of its decay is __________. 3. Potassium-42 is a radioisotope that nutritionists use to determine whether the body is effectively using potassium at the cellular level. The half-life of potassium-42 is 12.4 hours. Assuming that a patient's cells assimilate all the potassium chloride tagged with potassium-42, approximately what percentage of the dose remains in 2.1 days? __________ . 4. What are the products formed when nitroglycerin undergoes hydrolysis? 1) __________ and 2) __________.
acetylene gas undergoes combustion to produce carbon dioxide and water vapor. if 75.0 L of co2 are produced how many liters of acetylene are required?
What is the general rate law expression for this process? c. Calculate the half-life for elimination of the poison from the body. d. Calculate the total time that the deliberate Vitamin K1 treatment is required to reach a safe level, 10 micrograms..
a 13 ml sample of a solution of albr3 was diluted with water to 25ml. a 15 ml sample of the dilute solution was found
It takes 30.80ml of hydrochloric acid to neutralize 16.20 liter of 0.150 molars of magnesium hydroxide. determine the molality of the acid
Catalytic converters work to remove nitrogen oxides and carbon monoxide from exhaust. Balance the skeletal equation for one of the reactions that occurs in a catalytic converter.
When 2-chloro-2-methylbutane is treated with a variety of strong bases, the products always seem contain two isomers (A and B) of formula C5H10.
If one slice of chocolate cake contains 35 g od carbohydrats, 15g of fat and 5g of protein. Compute the kilocalories that each slice of cake contains. Classify all the food groups that form a part of a balanced diet along with their sources.
What is the hydronium ion concentration of a 0.150 M hypochlorous acid solution with Ka=3.5x10^-8? The equation for the dissociation of hypochlorous acid is
When the unknown was treated with 3M (NH4)2CO3 solution a white precipitate formed. Because the acetic acid bottle was empty , the student used 6M HCl to dissolve the precipitate
Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts u'ith essential enzymes-leading to irreversible inactivity of these enzymes.
The process of boiling a reaction mixture and condensing the solvent vapors back into the reaction vessel is known as
Solubility in water in hexane, when mixed water and ether(diethyl ehter), why two layers will form ? Which layer will be top layer why?
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