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How long will it take 50 grams of a substance to decay to 10 grams if the rate of decay is k -0.345?
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30 gram of a radioactive substance that has a half-life of 2 days after 2 days how much will be left?
With radioactive decay, predicting when any individual atom will decay is nearly impossible. However, when a lot a particles are present, then it is possible to get a general idea of how much will decay in a certain period of time. The half-life is this measurement, and it is the time that it takes for one halfof the substance to decay. Hence half-life or how long it takes for half to "die".For any size sample of a substance, the half-life is how long it takes for half to be left, so for a substance with a half-life of 2 days, half of the substance will decay in two days. Therefore your answer is simply half of 30g which is 15g.Additional reading: http://simple.wikipedia.org/wiki/Radioactive_decay
What does the half life of a radioactive substance indicate?
It indicates how long it takes for the material to decay.
Carbon-14 has a half-life of 5730 years. how long does it take a 200-gram sample of carbon-14 decay to a mass of 100 grams?
5,730 years
In chemistry what is a half life?
A half-life is the time it takes for half of the atoms in a sample of a radioactive substance to decay. It is a constant characteristic of each radioactive isotope and is used to determine the rate of decay of a substance.
A pure radioactive substance has a half-life of 3 hours. How long would it take a mass of 12g of that substance to decay to 3g?
It would take 6 hours for a mass of 12g of the substance to decay to 3g. This can be calculated by recognizing that for every half-life, the mass is halved. So, after 1 half-life (3 hours), the mass would be 6g, and after 2 half-lives (6 hours), the mass would be 3g.
How long will it take 24 grams of plutonium -240 to Decay to 20 gram?
The half-life of plutonium-240 is about 6,560 years. If 24 grams decay to 20 grams, it represents a loss of 4 grams of plutonium. The time it would take for 24 grams to decay to 20 grams would depend on the specific decay rate and is typically calculated using exponential decay equations.
How long will it take 600 grams of Plutonium to decay on 18.75 grams?
Each isotope has another half life.
How long will it take 27 grams of plutonium-240 to decay to 9 grams?
9987.3844 or 9,990
How long will it take 36 grams of plutonium 240 to decay to 12 grams?
The decay of plutonium-240 has a half-life of about 656 million years. To go from 36 grams to 12 grams would require two half-lives, so it would take approximately 1.3 billion years for 36 grams of plutonium-240 to decay to 12 grams.
30 gram of a radioactive substance that has a half-life of 2 days after 2 days how much will be left?
With radioactive decay, predicting when any individual atom will decay is nearly impossible. However, when a lot a particles are present, then it is possible to get a general idea of how much will decay in a certain period of time. The half-life is this measurement, and it is the time that it takes for one halfof the substance to decay. Hence half-life or how long it takes for half to "die".For any size sample of a substance, the half-life is how long it takes for half to be left, so for a substance with a half-life of 2 days, half of the substance will decay in two days. Therefore your answer is simply half of 30g which is 15g.Additional reading: http://simple.wikipedia.org/wiki/Radioactive_decay
What does the half life of a radioactive substance indicate?
It indicates how long it takes for the material to decay.
What does a half life of a radioactive substance indicate?
It indicates how long it takes for the material to decay.
How long does it take for 200 grams of carbon 14 to decay into 100 grams?
The half-life of carbon-14 is about 5700 years. This means that in 5700 years, half of the original 200 grams (100 grams) will have decayed. To decay from 200 grams to 100 grams, it will take one half-life, or 5700 years.
A pure radioactive substance has a half-life of 3 hours. How long would it take a mass of 12g of that substance to decay to 3g?
It would take 6 hours for a mass of 12g of the substance to decay to 3g. This can be calculated by recognizing that for every half-life, the mass is halved. So, after 1 half-life (3 hours), the mass would be 6g, and after 2 half-lives (6 hours), the mass would be 3g.
How long will it take 36 grams of plutonium-240 to decay to 12 grams in years?
The half-life of plutonium-240 is about 6,560 years. To find the time it takes for 36 grams to decay to 12 grams, we can use the formula N = N0 * (1/2)^(t/t1/2), where N is the final amount, N0 is the initial amount, t is the time, and t1/2 is the half-life. Substituting the values, we find that it will take approximately 13,120 years for 36 grams of plutonium-240 to decay to 12 grams.
How long does it take a 5-gram sample of uranium- 235 to decay to a mass of 2.5 grams?
One Half-Life :-)
If a substance starts with twenty grams and has a half life of five years how long will it take for there to be ten grams?
It will take five years.
