Answer: 0.125mg americium
Half-lives is a set of duration when a sample will become half of their original mass. In this case, the initial mass is 1mg and the sample is going for 3 times half-lives. Then the calculation would be: 1mg

= 1/8 mg= 0.125mg.
Answer:
-32821.2 J (negative sign implies that work is done by the system)
Explanation:
The expression for the calculation of work done is shown below as:
Where, P is the pressure
is the change in volume
From the question,
= 18.0 - 1.00 L = 18.0 L
P = 18.0 atm
Also, 1 atmL = 101.3 J
So,
(negative sign implies that work is done by the system)
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Answer:
igneous rocks
Explanation:
igneous rocks forms from lava, such as obsidian, basalt, plumice, etc
Rocks and minerals are usually composed of two or more minerals