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How much time is required for a 5.75 mg sample of Cr-51 to decay to 1.44 mg if it has a half life of 27.8 days?
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How many days rest required after circumstance operation?
15 days
What fraction of a radium sample will remain after 3240?
The answer depends on 3240 WHAT: seconds, days, years?
17 weeks is equal to how many days?
1 week = 7 days. You now have all the information required to answer this and similar questions.
96 men in 24 days does a job. How many people required to do the same job in 20 days?
96 x 24/20 = 116 for first 4 days and 115 for remaining 16 days
How can you calculate BOD Mathmaticly?
The Biochemical Oxygen Demand (BOD) of a sample is the amount of dissolved oxygen required by aerobic microorganisms to breakdown organic matter in the sample.The test is simple:Measure the Dissolved Oxygen content of the sample (a)Place in a sealed darkened bottleIncubate for 5 days at 20'CMeasure the Dissolved Oxygen content of the incubated sample (b)Generally you're using this test to analyse contaminated water, so you'll want to dilute it first - it may be that aren't enough aerobic microorganisms present to give you a measurable result, in which case you'll need to inoculate the sample with a suitable culture.The BOD of the sample = a - bBOD is expressed in mg O2/L of sample.Extra CreditGenerally you're using this test to analyse contaminated water, so you'll want to dilute it first - it may be that aren't enough aerobic microorganisms present to give you a measurable result, in which case you'll need to inoculate the sample with a suitable culture.The BOD of a diluted innoculated sample = ((a - b) - BOD of inoculated culture) * dilution factor
How many days must elapse for a 0.80 Mg sample of iodine-131 in the thyroid to decay to 0.10 Mg?
The time required is 24.06 days. The half life of iodine 131 is 8.02 days.
How much time is required for a 6.95 sample of to decay to 0.850 if it has a half-life of 27.8 days?
To calculate the time required for the sample to decay to 0.850, you need to determine how many half-lives have passed. Each half-life reduces the amount by half. First, find how many half-lives it takes to decay from 6.95 to 0.850. Then, multiply the number of half-lives by the half-life duration (27.8 days) to get the total time required.
How long does it take a 100.00g sample of Au-1.98 to decay to 6.25g?
10.76 days
How many days are required for 200 grams of radon-222 to decay to 50.0 grams?
7.64 days
What is the sample of the radioactive isotope 131I decays its half-life?
The sample of radioactive isotope 131I decays over its half-life of approximately 8 days. This means that within 8 days, half of the initial amount of 131I will decay through radioactive decay.
What is the half life of a radioactive isotope if it takes 6.2 days for a 72 gram sample to decay to 18grams?
18 grams are one fourth of the original sample mass of 72 grams. Accordingly, the half life is 6.2/4 = 1.55 days.
How much of an 80-milligram sample of Iodine-131 would be left after 32 days?
After 32 days, approximately 5 milligrams of the 80-milligram sample of Iodine-131 would be left. Iodine-131 has a half-life of about 8 days, so after each 8-day period, half of the remaining sample will decay.
How many days are required for 200 grams of radon-222 to decay to 50 grams?
7.64 it is the half life of radon-222 multipled by 2
How many days are required for 200 grams of radon 222 to decay to 50.0 grams?
Radon-222 has a half-life of about 3.8 days. To calculate the time required for 200 grams of radon-222 to decay to 50 grams, you can use the formula: [N = N_0 \left(\frac{1}{2}\right)^{\frac{t}{t_{1/2}}}] where N is the final amount (50 grams), N0 is the initial amount (200 grams), t is the time in days, and t1/2 is the half-life. Solving for t gives around 7.6 days.
How long will it take for a 12.0-g sample of iodine-131 to decay to leave a total of 1.50 g of the isotope The half-life of iodine-131 is 8.07 days?
To solve this problem, you can use the formula for radioactive decay: N(t) = N0 * (1/2)^(t/T), where N(t) is the amount of the isotope remaining at time t, N0 is the initial amount, t is the elapsed time, and T is the half-life. Plugging in the values: 1.50 g = 12.0 g * (1/2)^(t/8.07), solve for t to find the time it takes for the iodine-131 to decay to 1.50 g.
What is the half life of radioisotope?
The half-life of a radioisotope is the time it takes for half of the atoms in a sample to undergo radioactive decay. It is a characteristic property of each radioisotope and can range from fractions of a second to billions of years, depending on the specific isotope.
The half life of iodine-131 is 8.0252 days How long will it take for a sample to decay to three-fourths of its original size?
A radioactive nuclide with a half-life of 8.0252 days will decay to 0.75 of its original size in 3.33 days. AT = A0 2(-T/H) 0.75 = (1) 2(-T/8.0252) log2(0.75) = log2(2(-T/8.0252)) -0.415 = -T/8.0252 T = 3.33
