2Al (s) + 3Cl2 (g) --> 2AlCl3 (s) (balanced) When 52 grams of chlorine gas react, the actual yield is 42.5 grams, what is the
percent yield?

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

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water pollution kills aquatic life. aquatic life includes algae and other plant life that use photosynthesis. photosynthesis takes   c02 out of the air.  

c02is a greenhouse gas.