Nucleophilic substitutions of epoxides yield synthetically useful products. answer the following questions about nucleophilic substitution of epoxides. solution part 1 (3 points)explanationsee hint select the answer choice that will allow you to produce this transformation successfully. choose one: a. dilute hcl, ch3ch2oh b. hcl, ch3oh c. ch3ch2oh d. ch3ch2ona, ch3ch2oh

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.