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FinnZ [79.3K]
3 years ago
7

Why can't calcium hydroxide be written caoh2?

Chemistry
1 answer:
Alexxandr [17]3 years ago
4 0
I'm assuming you mean without parenthesis and that's because if there are no parenthesis, then it looks like there is one Calcium, one Oxygen, and two Hydrogen instead of one Calcium and two Hydroxide like Ca(OH)2.
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What’s the difference between a learned behavior in an inherited behavior? Give one example of each
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A learned behavior is a behavior that develops during an animal's lifetime. Tying one's shoes or solving a math problem are examples of learned behaviors. An inherited behavior is a behavior that an animal is born with. It does not have to be taught. For example, a bird can build a nest for the first time without any help.

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7665 years

Procedure

Let N₀ be the amount of carbon-14 present in a living organism. According to the radioactive decay law, the number of carbon-14 atoms, N, left in a dead tissue sample after a certain time, t, is given by the exponential equation:

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where λ is the decay constant which is related to half-life (T1/2) by the equation:

\lambda=\frac{ln(2)}{t_{\frac{1}{2}}}

Here, ln(2) is the natural logarithm of 2.

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The half-life of carbon-14 is 5,720 years, thus, we can calculate λ using the second equation, and then find t.

\lambda=\frac{ln(2)}{5720}=1.211\times10^{-4}

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t= 7665 years

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