Iron(II)sulfide Has a Primitive Cubic Unit Cell with Sulfide Ions

question 35

Multiple Choice

Iron(II) sulfide has a primitive cubic unit cell with sulfide ions at the lattice points.The ionic radii of iron(II) ions and sulfide ions are 88 pm and 184 pm,respectively.What is the density of FeS (in g/cm³) ?

• A) 2.56 g/cm³
• B) 4.71 g/cm³
• C) 5.25 g/cm³
• D) 6.66 g/cm³
• E) 8.97 g/cm³

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Definitions:

Plantar Flexion

A movement that involves the bending of the foot downwards at the ankle, pointing the toes away from the shin.

Inversion And Eversion

Inversion and eversion refer to movements of the sole of the foot. Inversion involves turning the sole inward, toward the midline of the body, while eversion refers to turning the sole outward, away from the midline.

Feet

The lower part of the leg below the ankle, on which a person stands or walks.

Triaxial

Refers to a system or component operating or existing in three distinct axes simultaneously, often used in reference to joints or stress analysis.