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

---

Definitions:

Face Value

The nominal or dollar value printed on a security or financial instrument, such as a bond or stock certificate, representing its value at issuance.

Bonds' Market Value

The current price at which a bond is trading in the market, which can be above (at a premium) or below (at a discount) its face value.

Prices Quoted

The stated prices for goods or services offered to customers, which can be subject to negotiation or change.

Percentage

A proportion or share in relation to a whole, typically expressed as a fraction of 100.