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UNO [17]
3 years ago
5

Write each formula to solve for density, volume and mass.

Chemistry
1 answer:
aleksandr82 [10.1K]3 years ago
6 0
D= M/V
V= M/D
M= D x V
hope it helps!!
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A wooden artifact from an ancient tomb contains 60% of the carbon-14 that is present in living trees. How long ago was the artif
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The age of the sample is 4224 years.

Explanation:

Let the age of the sample be t years old.

Initial mass percentage of carbon-14 in an artifact = 100%

Initial mass of carbon-14 in an artifact = [A_o]

Final mass percentage of carbon-14 in an artifact t years = 60%

Final mass of carbon-14 in an artifact = [A]=0.06[A_o]

Half life of the carbon-14 = t_{1/2}=5730 years

k=\frac{0.693}{t_{1/2}}

[A]=[A_o]\times e^{-kt}

[A]=[A_o]\times e^{-\frac{0.693}{t_{1/2}}\times t}

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t = 4223.71 years ≈ 4224 years

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What does the atomic number of an element refer to on the periodic table?
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The elements are listed in order of increasing the atomic number. Its the number that is the number of protons in the nucleus of an atom.

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