Answer:

Explanation:
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In this case, since Helium is undergoing a volume-pressure change, according the Boyle's law, we infer the following equation is used:

Thus, since we are not given the volume at 0.25 atm, we can solve for V2 to do so:

Thus, we plug in to obtain:

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Answer:
2
Explanation:
As only 2 electrons can present in an orbital, so only 2 electrons in an atom can have this set of quantum numbers.
B metal is denser, wood will float and so will paper and plastic