. A sample of Strontium-90 has a Half-Life of 28.1 years. How long will it take for a sample to
decay to 12.5% of its original mass?
A sample of Ge-66 (Half-Life = 2.5 hours) sat for 10 hours and only 5 grams remain. What wog
the mass of the original sample?
w
Element X is a Radioisotope. If a 100-kg sample of Element X decays to 12.5 kg in 1 day, what
is the Half-Life of Element X in hours?
Strontium-90 (Half Life = 28.1 years) is used as a Radioactive Tracer in Medical and Agricultural
Studies. How many atoms out of a 1.68 x 1023 atom sample will remain undecayed after 56.2
years?
What percentage of a 900-gram sample of Potassium-37 (Half-Life = 1.23 seconds) exists after
6.15 seconds?
Answers: 2
Chemistry, 22.06.2019 20:30
Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that
Answers: 2
Chemistry, 23.06.2019 13:00
If volume remains the same while the mass of a substance the density of the substance
Answers: 1
Chemistry, 23.06.2019 20:30
If the price of gasoline is $3.85 per us gallon, what is the cost per liter? (1 l =1.06 qt)
Answers: 1
Chemistry, 24.06.2019 01:10
The suzuki reaction is an important coupling reaction for carbon. in a typical suzuki reaction, a vinyl or aryl halide is treated with an organoboron compound and a palladium catalyst under basic conditions. below are the four key steps to the suzuki reaction. order the steps from first to last by dragging the steps to the appropriate spots.
Answers: 1
. A sample of Strontium-90 has a Half-Life of 28.1 years. How long will it take for a sample to
de...
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