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Problem- (1) Iodine-131 has a half-life of 8 days. If you started with a 12.0-mg sample of I-131, how much would remain after 24 days?
(2) lutonium-239 is a byproduct of the fission reaction used to produce energy in nuclear power reactors. It has a half-life of 24,400 years. A student determines that it will take 97,600 years for the radioactivity of a Pu-239 sample to drop to one-eighth of its original level. Show calculations to support or refute her conclusion.
(3) Strontium-90 is present in the fallout produced by nuclear weapons testing in the atmosphere. Sr-90 is potentially dangerous to humans and animals because it substitutes chemically for calcium in bones and has a half-life of almost 29 years. What percent of the original amount of Sr-90 remains in a 61 year-old woman who unknowingly drank Sr-90 in contaminated milk when she was 3 years old?
As much detail as probable is really appreciated, I am stuck in between this question please help me out
How much faster do ammonia (NH3) molecules effuse than carbon monoxide (CO) molecules? RATE OF NH3 effusion/rate of CO efusion
The solubility of copper (I) chloride is 3.91mg per 100.0mL of solution. Find the Ksp for copper (I) chloride.
The Haber-Bosch process is a very important industrial process. In the Haber-Bosch process, hydrogen gas reacts with nitrogen gas to produce ammonia according to the equation 3H2+N2=2NH3
A thermometer containing 9.5 of mercury has broken. If mercury has a density of 13.6 , what volume spilled
how many liters of hydrogen gas are collected over water at 18 degrees celsius and 725 mmhg when 0.84g of lithium
if a sample of gas is at 2 atm and is at 15 degrees celsius, what would be the new pressure in the gas if the gas is heated to 100 degrees celcius?
Which choice lists two health effects expected from the depletion of the ozone layer. asthma lung cancer skin cancer cataracts emphysema 1 and 5 2 and 3 3 and 5 3 and 4 4 and 5
the bottom of a box has a surface area of 25.0 cm2. the mass of the box is 34.0 kilograms. acceleration due to gravity
A family used 1,438 kilowatt hours (kwh) of electricity during the month of October. Express this amount of energy in joules and Btu.
Fusion of boric acid with sodium oxide forms a borate salt, Na2BO7. Without writing complete equations, find the mass (in grams) of B5H9 required to form 156g of the borate salt by this reaction sequence.
a 1.60 g sample of a large biomolecule a nonelectrolyte was dissolved in 18.0 g of carbon tetrachloride. the boiling
The value of Kc for the reaction below is 0.016. Under a set of equilibrium conditions, [HI] = 0.10 M and [H2] = [I2]. Calculate the concentration of I2 (M).
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