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Problem: The density of solid Cr is 7.15 g/cm 3. How many atoms are present per cubic centimeter of Cr? in atoms/cm3As a solid, Cr adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Cr? in unit cells/cm3What is the volume of a unit cell of this metal? in cm 3What is the edge length of a unit cell of Cr? in cm

FREE Expert Solution

PART 1

We are asked to determine how many atoms are there per cubic centimeter of Cr given the density. 

We basically need to convert g → atoms. 

When doing unit conversions:

 Put units you need to cancel out on opposite places (if it’s in the numerator then put the conversion factor with the same unit in the denominator)

 always raise the units to the necessary number especially when dealing with volume, area, etc.


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Problem Details

The density of solid Cr is 7.15 g/cm 3. How many atoms are present per cubic centimeter of Cr? in atoms/cm3

As a solid, Cr adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of Cr? in unit cells/cm3

What is the volume of a unit cell of this metal? in cm 3

What is the edge length of a unit cell of Cr? in cm

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Unit Cell concept. You can view video lessons to learn Unit Cell. Or if you need more Unit Cell practice, you can also practice Unit Cell practice problems.

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Based on our data, we think this problem is relevant for Professor Addo-Mensah's class at TAMIU.