David Makes Candles That Are 7cm Tall

question 34

Short Answer

David makes candles that are 7cm tall. Each candle burns 3 hours before going out. He is wondering how many hours a 21cm tall candle can burn for. Assuming that the relationship between the height of a candle and number of hours it burns is proportional; determine the proportion that can be used to model this scenario and how long a 21cm tall candle can burn for.

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Definitions:

O-H Stretch

A vibrational mode observed in infrared spectroscopy, characteristic of the stretching of the O-H bond in molecules, indicative of the presence of alcohols or water.

Alcohols

Organic compounds characterized by one or more hydroxyl (-OH) groups attached to a carbon atom.

IR Absorption

A technique in spectroscopy where molecules absorb infrared light, causing vibrational transitions, used to identify chemical compounds.

IR Absorption

The process by which molecules absorb infrared radiation at specific wavelengths corresponding to vibrations of molecular bonds.