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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?
Wiki User
∙ 12y ago
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.
Wiki User
∙ 12y ago
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How many potassium atoms are there in a sample of K2Cr2O7 having a mass of 24.43 g?
The number of potassium atoms is 2,04.10e21.
What is the number of potassium atoms compared to oxgen atoms in a binary compound made from these two elements?
Three potassium oxides are known: - K2O: 2 potassium atoms and 1 oxygen atom - KO2: 1 potassium atoms and 2 oxygen atoms - K2O2: 2 potassium atoms and 2 oxygen atoms
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 atoms are in one unit of potassium iodine?
Potassium iodide is two atoms, one of potassium and one of iodine.
What is the ratio of potassium oxide?
1:2 --- Three potassium oxides are known: - K2O: 2 potassium atoms and 1 oxygen atom - KO2: 1 potassium atoms and 2 oxygen atoms - K2O2: 2 potassium atoms and 2 oxygen atoms
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
How many potassium atoms are there in a sample of K2Cr2O7 having a mass of 24.43 g?
The number of potassium atoms is 2,04.10e21.
How many atoms are in a sample of 1.83 moles of potassium (K) atoms?
Okay, a mole of potassium perchlorate contains 6.02x1023 formula units of potassium perchlorate, but you're asking about individual atoms. So, let's look at the formula: KClO3. That's 1 potassium, 1 chlorine, and 3 oxygens, for a total of 5 atoms per formula unit. Now, multiple 5 by Avogadro's number above, to get 30.1x1023, which simplifies to 3.01x1024 atoms.
What is the mass of potassium if a potassium sample contains 5 times the number of atoms as in 9.85 grams of gold?
The gram atomic mass of gold is 196.967 and that of potassium is 39.0983. Therefore, equal numbers of atoms of potassium are supplied by 39.0983/196.967 the mass of potassium compared with gold. 5 X 9.85 = 49.25. This contains the same number of gold atoms as 49.25(39.0983/196.967) or 9.78 grams of potassium contains of potassium atoms, to the justified number of significant digits (limited by the number "9.85", assuming that "5" is intended to be exact.)
Does the substance KBr have covalent bonds between atoms?
No That particular pair of atoms is almost completely ionic. Potassium Bromide has maybe one in a billion covalent bonds.
What is the ratio of potassium atoms to nitrogen?
The chemical formula of potassium nitride is K3N. The ratio potassium atoms/nitrogen atoms is 3.
What is the number of atoms for potassium iodide?
There is one atom of potassium in a unit of potassium iodide.
What is the number of potassium atoms compared to oxgen atoms in a binary compound made from these two elements?
Three potassium oxides are known: - K2O: 2 potassium atoms and 1 oxygen atom - KO2: 1 potassium atoms and 2 oxygen atoms - K2O2: 2 potassium atoms and 2 oxygen atoms
What is the correct number of atoms and elements in Potassium Sulphate?
In Potassium Sulphate there are two atoms of potassium, one atom of sulphur and four atoms of oxygen so there are 7 atoms and three elements.
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!
What happens when sulfur reacts with potassium?
Electrons move from the potassium atoms to the sulfur atoms.
How many atoms are in one unit of potassium iodine?
Potassium iodide is two atoms, one of potassium and one of iodine.
