EasyChemistryHigh School (9–10)GeneralCarbon and Its Compounds › Hydrocarbons and NomenclatureNumericalBoard Exam
Write the formula of the alkane with 14 carbon atoms…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Write the formula of the alkane with carbon atoms. What is its molar mass? (, .) This alkane is a part of the wax in candles. Is it likely to be a gas, a liquid or a solid in a room?
Need a reminder? The key ideaShow
Alkanes are saturated, , names ending in -ane. Each member of a homologous series has one more , , than the one before. Boiling points rise along the series. Isomers have the same formula and different structures.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Formula. : .
Step 2. Molar mass. .
Step 3. State. Long alkanes have stronger forces between their molecules. Those in candle wax are soft solids or thick liquids in a room.
Answer: , ; a waxy solid or a thick liquid, far from a gas.
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