B. They work against a strong gravitational force
Answer:
is there a way of reducing light pollution at the edges of a forest work?
Answer: cycloaddition of 1,3-butadiene and allyl anion is thermally allowed.
Explanation:
Using the frontier molecular orbital approach, we consider if the symmetry of the LUMO of the diene (1,3-cyclobutadiene) and the HOMO of the dienophile allyl anion), match each other since the diels alder reaction is a symmetry allowed process. The symmetries of these frontier molecular orbitals match each other hence the reaction is thermally allowed. It should be notes that 4+2 cycloadditions are thermally allowed although they are slow.
Answer:
15000
Explanation:
1000 Meters in a kilo meter. So multiply 15 by a 1000.
