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Calculate the effective radiation dosage (in Sieverts) for a 85-kg person who is exposed to 7.3 × 109 particles of alpha radiation. Assume that 85% of the radiation is absorbed, each alpha particle has an energy of 6.0× 10-13 J, and that the RBE of the alpha particles is 15. Note that RBE is sometimes abbreviated as Q.
At a certain temperature, the pH of a neutral solution is 7.72. What is the value of Kw at that temperature
calculate how many pounds of carbon dioxide are produced when 40.00 gallons of gasoline are combusted. Assume that the primary ingredient in gasoline is octane, C8H18(l), which has a density of 0.703 g·mL-1
when 3.299 of iodine reacts with fluorine, 5.768g of IFx is formed. What is the value of x in product formula (IFx)?"
find the wt percent of C and H. find the smallest integer ration of C:H in the compound
Calculate the volume the gas will occupy if the pressure is increased to 1.88 atm while the temperature is held constant
Observe significant figure rules. Constants: ideal gas const = R = 0.08206 L atm/mole K; 1 mole of gas at STP occupies 22.41 L. Atomic masses: H 1.008 O 16.000 g/mole. You must show work to identify the limiting reagent; no credit for guessing.
What conclusions can you draw concerning structures of species containing the same number of atoms and the same number of valence electrons?
What is the heat of the reaction which forms 1.00 mole of gaseous monatomic bromine from 0.500 mole gaseous diatomic bromine.
You have a sample that consists of 8.2 (+ or -)o.1mL of aqueous 239Pu solution. You measure two 10mL aliquots by liquid scintillation counting and get 3211.4 cpm and 3315.2 cpm, respectively.
what is the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. write none if no insoluble salt forms. a)AgNo3(aq) + Na2SO4(aq). b)KCl(aq) + Pb(NO3)2(aq). c)CaCl2(aq) + (NH4)3PO4(aq). ..
A 4.20 g nugget of pure gold absorbed 290 J of heat. What was the final temperature of the gold if the initial temperature was 25.0°C? The specific heat of gold is 0.129 J/(g·°C).
Thermochemistry and Periodic Properties of Elements. State which atom is larger according to periodic trends. Explain the difference for each of the pairs.
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