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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?
If a container having a volume of 322mL at 25.o degrees celcius was to suddenly reduce to 75.0mL, what would be the new temp.(n,p constant)?
A 706 mL gas sample at STP is compressed to a volume of 248 mL, and the temperature is increased to 39?C. What is the new pressure of the gas in Pa.
Determine the equilibrium concentrations - what are the new equilibrium concentrations of all species.
The decomposition of ozone in the upper atmosphere is facilitated by {\rm NO}. The overall reaction and the rate law are O3(g) + O(g) = 2 O2(g) Rate = k [ O3}][ NO]
Determine the delta G standard state at 298 K from the following standard state values at T= 298, Determine the delta G standard state at 1000K. assume delta H is independent of temperature
Calculate what the limiting reactant is in the reaction between copper (II) oxide and hydrochloric acid
If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room?
A 499 mL sample of solution contains 32.0 g of CaCl2 Calculate the molar concentration of Cl - in this solution
A sealed balloon is filled with 1.00 L of helium at 23 degrees celsius and 1.00 atm. The baloon rises to a point in the atmosphere where the pressure is 220 torr and the temperature is -31 degrees celsius.
Which of the following correctly lists the following isomeric alkanes in order of increasing boiling point? n-hexane, 2,3-dimethylbutane, 2-methylpentane
write an equat ion which, if solved,would give the average scalar momentum, , of molecules of an equilibrium gas.
Application of Avogadro's law - To evaluate the volume of a gas using Avogadro's Law.
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