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Electrical properties were determined for a new material called dragonite which is considered to be a...

Electrical properties were determined for a new material called dragonite which is considered to be a metallic conductor. It was found that its electrical conductivity is 2.5*10^7 and electron mobility is 0.003 . For dragonite, you can assume a density of 8.1 and an atomic mass of 75.4 .

What is the number of free electrons per atom in this material? Enter your answer as a number to two decimal places.

Solutions

Expert Solution

Conductivity is given as :

where:

: conductivity

: electron concentration

: charge of 1 electron ( = 1.6*10-19)

: electron mobility

Plugging in values:

density,

Number of free electrons per kg of dragonite

Molecular weight,

Number of free electrons per mol of dragonite

Number of free electrons per atom of dragonite

Amanda K answered 3 weeks ago

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