Answer:
Molecular geometry Vsepr
According to VSEPR, the valence electron pairs surrounding an atom mutually repel each other; they adopt an arrangement that minimizes this repulsion, thus determining the molecular geometry. This means that the bonding (and non-bonding) electrons will repel each other as far away as geometrically possible.
Explanation:
I would say B because c and d would decrease competition and a would do the same, or just kill the ecosystem.
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Answer: 25g/ml
Explanation:
Density = 100.0g/ 4.0mL = 25g/mL
