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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.

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?

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