Answer:
in an atom or molecule, no two electrons can have the same four electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing spins.
Answer:
This is hilarious, every time I ignite, they feed me water, little do they know this heat will defeat, and hydrogen only makes me stronger!
Explanation:
When Hg is burning, it uses the oxygen from H2O and turns it into hydrogen gas, and that contributes to the burning.
Answer:

Explanation:
Hello!
In this case, by considering helium gas as an ideal one, we can use the following equation:

Whereas P should go in atmospheres and T in Kelvins; thus we proceed as follows:

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Element Oxidized: S (S^(2-) --> S⁰)
Element Reduced: N (N^(5+) --> N(2+))
Oxidizing Agent: HNO3
Reducing Agent: H2S