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The best means of personal protection from radiation for emergency responders is the implementation of three basic principles: time, distance and shielding. Please show your work when answering the following questions:
a. Using the inverse square law of radiation, what Geiger counter reading would you get for a radioactive material when you are 3 feet from the source (assume an initial reading of 6300 R at a distance of 1 foot from the source)?
b. Dr. Brown has a radioisotope source containing 1.2 x 106 (also written as 1.2E+06) atoms of Plutonium-238 in 1985, how many atoms will remain in 352 years?
c. How many protons and neutrons are present in the plutonium-238 nucleus?
Consider the base monosodium phosphate and Write the structure of the conjugate acid of this base- ineffective for extracting C7H6O2 from a diethyl ether solution.
A generic salt, AB, has a molar mass of 243 g/mol and a solubility of 8.90 g/L at 25 C what is the Ksp of this salt
Calculate (a) the mole fraction of the solute, (b) the number of moles of solute in the solution, and (c) the molecular mass of the solute.
If the gas is at 23C and 1.0 atm, what mass of helium is in the blimp? The Goodyear blimps, which frequently fly over sporting events, hold approximately 1.85×105 ft^3 of helium.
Calculate the mass of silver chloride required to plate 215 mg of pure silver if silver chloride contains 75.27% Ag.
a 25 ml of sample of HNO3 is neutralized by 32.1 ml of 0.150 M KOH(aq). What is the molarity of HNO3?
Based on standard reduction potentials, would you expect copper metal to oxidize under standard conditions in the presence of oxygen and hydrogen ions
Determine How much Na2EDTA x 2 H2O must be weighed to form exactly two litres of 0.0500 M solution? FW=372.24
the standard molar enthalpy of vaporization for water is 40.79kj/mol. what mass of steam is required to release 500. kj of energy upon condensation.
How many grams of IO2F are needed to react completely with 150.0 g of BrF3? 3IO2F(s) + 4BrF3(l) → 3IF5(l) + 2Br2(l) + 3O2(g)
how many grams of KOH are present in 32.5mL of a 6.42 M KOH solution
Given Ksp {Fe(OH)2}= 1.6x10-14 and Kb(NH3)=1.8X10-5. What concentration of ammonia is necessary to start to precipitate ferrous hydroxide {Fe(OH)2} from a solution of 0.0030M FeCl2
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