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How much cesium would remain from a 10 g sample after 6 years?
After 6 years, approximately 5 grams of cesium-137 would remain from a 10 g sample due to its half-life of around 30 years. This decay is exponential, with about half of the original sample decaying every 30 years.
If you start with 60 atoms of uranium - 238 how many remain after 4470000000 years?
After 4.47 billion years, roughly half of the original atoms of uranium-238 would have decayed to lead-206 through alpha decay. This means there would be about 30 atoms of uranium-238 remaining.
How long has the Earth been habitable for living organisms?
The Earth has been habitable for living organisms for about 3.5 billion years.
What are the elements that hydrocarbons are made up of?
Hydrocarbons are composed of hydrogen and carbon atoms. These atoms can form various types of bonds, resulting in different classes of hydrocarbons such as alkanes, alkenes, and alkynes. The structures and properties of hydrocarbons depend on the specific arrangement of carbon and hydrogen atoms.
When did photosynthetic organisms appear?
Photosynthetic organisms, such as cyanobacteria, are believed to have appeared around 3.5 billion years ago. These early organisms played a crucial role in shaping Earth's atmosphere by producing oxygen as a byproduct of photosynthesis.
A carbon-14 sample starts with 100 atoms and 5730 years later there are 50 atoms. What is the half-life of carbon-14?
The half-life is 5730. This is because the half-life is the amount of time it takes for half of a sample to decay. In this case, the sample is 100 atoms, and half of 100 is 50, so the amount of time it takes the sample to reach 50 atoms is it's half life...5730!
How many years after dying does a sample lose one-half of it carbon - 14 atoms?
5730 years (approx).
A potassium-40 sample starts with 50 atoms and 1.25 billion years later there are 25 atoms. What is the half-life of potassium-40?
1.25 billion years
What is the half-life of potassium-40 if a potassium-40 sample starts with 50 atoms and 1.25 billion years later there are 25 atoms?
The half-life of potassium-40 is 1.25 billion years since half of the original sample decays in that time. With 50 atoms initially, having 25 atoms remaining after 1.25 billion years aligns with the expected decay pattern for a half-life.
A carbon-14 sample starts with 100 atoms and5730 years later there are 50 atoms what is the half life of carbon 14?
The half-life is 5730. This is because the half-life is the amount of time it takes for half of a sample to decay. In this case, the sample is 100 atoms, and half of 100 is 50, so the amount of time it takes the sample to reach 50 atoms is it's half life...5730!
When A carbon-14 sample starts with 100 atoms and 5730 years later there are 50 atoms. What is the half-life of carbon-14?
The half-life of carbon-14 is 5 730 years.
It takes 25 yearsfor a 2 ml sample of liquid mercury to evaporate Express this evaporation rate in atoms per second?
To calculate the evaporation rate, we need to know the number of atoms in the sample. The number of atoms in a 2 ml sample of liquid mercury can be calculated using Avogadro's number (6.022 x 10^23 atoms/mol for mercury). Then, divide the total number of atoms by the total number of seconds in 25 years to get the evaporation rate in atoms per second.
A uranium235 sample starts with 200 atoms and 700 million years later there are 100 atoms What is the halflife of uranium235?
700 milliion years. The definition of half-life is the period of time during which one-half of the atoms of an element undergo decay into other elements.
A potassium 40 sample starts with 50 atoms and 1.25 billion years later there are 25 atoms What is the half life of potassium 40?
1.25 billion years: 25/50 or half the original atoms have disintegrated in 1.25 billion years, and that is the definition of half life.
If a half life is 2000 years will a large amount of this radioactive sample be around for a long time?
Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.
How old is the sample of zircon with 35atoms of 207Pb?
A Sample Of Zircon 35 Atom Of 207Pb for every 5 atoms of 235U. How Old Is Zircon? t(1/2)=5730. K=0.693/704E6=9.8E-10 -1/K ln(5/90)= years
How many years would it take half of the rubidium-87 atoms in piece of rock to change into strontium-87?
The half-life of rubidium-87 is approximately 48.8 billion years. This means it would take about 48.8 billion years for half of the rubidium-87 atoms in a rock sample to decay into strontium-87. Therefore, to see half of the rubidium-87 atoms change into strontium-87, you would need to wait this extensive period.
