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Scilla [17]
3 years ago
13

Which of the following is a balanced equation for the reaction described below?

Chemistry
1 answer:
mylen [45]3 years ago
5 0
The correct answer is b
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Select the correct answer.
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Determine the total time that must elapse until only ¼ of an original sample of the radioisotope Rn-222 remains unchanged.
Arte-miy333 [17]

Answer:

7.6 days

Explanation:

Radon is a radioactive element and Radon-222 is it's most stable isotope. The half-life of Radon-222 has been found to be approximately 3.8 days.

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Final amount = \frac{1}{4} = A'

We will use the following relation for calculating time elapsed in the decay

A' = A(\frac{1}{2} )^\frac{t}{t_1_/_2}  }

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We can write is as,

(\frac{1}{2} )^2=(\frac{1}{2} )^\frac{t}{3.8}

Since the base in both sides are equal, powers can also be equal and thus,

2=\frac{t}{3.8}

So, t = 7.6 days

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3 years ago
Which liquid has the strongest intermolecular forces?<br> a.chcl3<br> b.ccl4<br> c.h2o?
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