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Percent purity greater than 100 percent?
A percent purity greater than 100 percent is not physically possible because it implies that the sample contains more of the substance than it actually does. This could be due to errors in the measurement or calculation process, and it is important to double-check the methods used to determine the purity of the substance.
How many half-lives have passed for 50 percent of the original radioactive material?
One half-life has passed for 50 percent of the original radioactive material to decay.
How do you calculate the percent dissociation of a substance in a chemical reaction?
To calculate the percent dissociation of a substance in a chemical reaction, you divide the amount of dissociated substance by the initial amount of the substance and multiply by 100. This gives you the percentage of the substance that has dissociated in the reaction.
Is 100 percent ethanol a pure substance?
Yes, as long as a substance is 100% (purity), it is considered as a pure substance. But logically, there is no such thing as a pure substance.
After three half-lives what percent of the radioactive isotope is remaining?
After three half-lives, 12.5% of the radioactive isotope is remaining. This is because each half-life reduces the amount of radioactive material by half.
When the amount of a radioactive substance is reduced by 50 percent what has occurred?
Half-Life APEX (; xoxo
What is a half-life of radioactive substance if it takes 6 hours for 50 percent of it to decay?
6 hours. you have a hot one there!
If the half-life of a radioactive substance is 10 hours how long will it take for 50 percent of it to decay?
The half-life of a radioactive isotope is defined as the time taken for the isotope to decay to half of its initial mass. So to decay to 50 percent of its initial mass will take one half-life of the isotope. One half-life of the isotope is 10 hours so the time taken to decay is also 10 hours.
If 10 percent of a radioactive substance disintegrates in 4 days what is it's half-life?
The half-life of the radioactive substance is 13.8 days. This is calculated by dividing the natural logarithm of 2 by the decay constant, which is obtained from the percentage disintegration in a given time period. In this case, 0.1 (10 percent) disintegrates in 4 days.
Can you determine the molecular formula of a substance from its percent composition?
Not completely. The empirical formula of a substance can be determined from its percent composition, but a determination of molecular weight is needed to decide which multiple of the empirical formula represents the molecular formula.
A sample of a radioactive substance decayed to 95 percent of its original amount after a year.what is the half life of the substance?
The half-life of a radioactive nuclide when 95% of it is left after one year is 13.5 years. AT = A0 2(-T/H) 0.95 = (1) 2(-1/H) ln2(0.95) = -1/H H = -1/ln2(0.95) H = 13.5
Percent purity greater than 100 percent?
A percent purity greater than 100 percent is not physically possible because it implies that the sample contains more of the substance than it actually does. This could be due to errors in the measurement or calculation process, and it is important to double-check the methods used to determine the purity of the substance.
What does a percent composition tell you about a substance?
It tells you what the substance is made of.
How many half-lives have passed for 50 percent of the original radioactive material?
One half-life has passed for 50 percent of the original radioactive material to decay.
How do you calculate the percent dissociation of a substance in a chemical reaction?
To calculate the percent dissociation of a substance in a chemical reaction, you divide the amount of dissociated substance by the initial amount of the substance and multiply by 100. This gives you the percentage of the substance that has dissociated in the reaction.
What is mole percent?
Mole percent, or molar percent of a substance is the ratio of the moles of a substance in a mixture to the moles of the mixture. It represents the number of moles of a substance in a mixture as a percentage of the the total number of moles in the mixture. Mole % = (mol substance in a mixture) / (mol mixture) * 100
The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called?
The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called the half-life of the radioactive element. It is a characteristic property of each radioactive isotope and can vary greatly among different elements.
