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.
Let, the initial amount of the Rn-222 = 1 = A
Final amount = 
= A'
We will use the following relation for calculating time elapsed in the decay
Thus,
We can write is as,
Since the base in both sides are equal, powers can also be equal and thus,
So, t = 7.6 days
The correct answer is option B.
The ingrredient in tobacco smoke is carbon monoxide which depletes the body's supply of oxygen.
What is tobacco?
Tobacco is the common name for numerous plants in the genus Nicotiana of the Solanaceae family, as well as the umbrella word for any product made from the cured leaves of these species.
Dried tobacco leaves are mostly used for smoking in cigarettes, cigars, pipes, and shishas. They are also available in snuff, chewing tobacco, dipping tobacco, and snus form.
To learn more about tobacco click the given link
brainly.com/question/220321
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<span>175.5g
</span>Cl(35.5) x 3 = 106.5
Na(23) x 3 = 69
106.5 + 69 = 175.5g
or
0g because sodium and chlorine are not chemically bonded.
