Problem: Alabandite is a mineral composed of manganese(II) sulfide (MnS). The mineral adopts the rock salt structure. The length of an edge of the MnS unit cell is 5.223 Å at 25˚C. Determine the density of MnS in g/cm3 m g/cm^3.

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FREE Expert Solution

Step 1

mass = 4 atoms MnS 1 unit cell×1 mol MnS6.022×1023 atoms MnS×87.004 g MnS1 mol MnS

mass = 5.78x10-22 g MnS/ unit cell


Step 2

volume = a3volume = (22·r)3volume = (22×5.223×10-10 m1 ×1 cm10-2 m)3

volume = 3.224x10-21 cm3


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Problem Details

Alabandite is a mineral composed of manganese(II) sulfide (MnS). The mineral adopts the rock salt structure. The length of an edge of the MnS unit cell is 5.223 Å at 25˚C. Determine the density of MnS in g/cm3.

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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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Casey's class at UNR.