Answer:
<h3>The answer is 113.1 cm³</h3>
Explanation:
The volume of a sphere is given by
where
r is the radius of the sphere
From the question
r = 3 cm
We have
We have the final answer as
<h3>113.1 cm³</h3>
Hope this helps you
No, the two isotopes of lithium-6 and lithium-7 are not equally common.
The more plentiful isotope would be lithium-7.
This can be easily demonstrated by assuming that both isotopes were equally common. If that were the case, the average atomic mass would be (6 + 7)/2 = 6.5 amu. Now compare that value if they were both equal to the actual value found in nature. The value found in nature is 6.941 amu which is heavier than the 6.5 amu that would happen if they were equally common. Since the natural value is heavier, that means that there has to be more of the heavier isotope than there is of the lighter one. Therefore lithium-7 is more common than lithium-6.
120 grams of Carbon-14 decays to 15 grams in 17,190 years.