From my understanding all you are doing is converting liters to grams. It says you have one leader of hydrogen peroxide. 1 liter equals 1000 grams. And if it is asking how many grams are in 1 liter hydrogen peroxide then the answer would be 1000 grams
Although, a wasp's sting can ward of some kinds of predators.
Answer: a tool to help find the periodicals that contain articles on a particular subject.
A periodical index is a tool that contains the subject, author and keywords of a particular list of periodicals. This tool helps you find articles about specific topics. The way to look through an index is similar to that of looking for items in a library catalog.
I believe that the first and last paragraphs are realism because of their cynical descriptions of harsh things, and the middle two are romanticism because of their embellished/elegant descriptions.