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lyudmila [28]
3 years ago
7

Question 6

Chemistry
1 answer:
fiasKO [112]3 years ago
6 0

Answer:

7.15g/cm³

Explanation:

To solve this question we must know that a body-centered cubic unit cell contains 2 atoms.

The volume of the unit cell is:

289pm = (289x10⁻¹²m)³ =

2.414x10⁻²⁹m³ * (1cm³ / 1x10⁻⁶m³) = <em>2.414x10⁻²³cm³</em>

<em />

And the mass is -Molar mass Chromium = 51.9961g/mol:

2atoms * (1mol / 6.022x10²³atoms) * (51.9961g / mol) =

<em>1.727x10⁻²²g</em>

<em />

The density is:

1.727x10⁻²²g / 2.414x10⁻²³cm³ =

<h3>7.15g/cm³</h3>

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