9. Which property is not important when selecting a material to use as a light bulb filament? d
high melting point
high vapor pressure
high ductility

high melting point

Explanation:

The filament of a bulb is often heated to very high temperatures as the bulb is in operation.

Many times, electric bulbs may have to be on for a whole day and they may reach temperatures that are outrageously high in the process.

The material of the filament must have a very high melting point so that it doesn't melt while the bulb is still in operation.

answer: mole of the gas

answer: mole of the gasexplanation:

answer seismograph;