When heating a substance over a bunsen burner where should the object be placed for the most efficient heating?

for the most efficient heating the object should be placed over the blue flame, above the tip of the flame, where the gases are hottest and there will be no interference with the combustion process, which could result in soot formation.

Explanation:

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

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