Question

Write the formulas of the following molecules (a) silicon disulfide (b) phosphine (c) diphosphorus pentoxide (d) radon tetrafluoride (e) nitrogen trichloride

Short answer

Answer: The formulas for the given molecules are: (a) SiS2, (b) PH3, (c) P2O5, (d) RnF4, and (e) NCl3.

Step-by-step solution

(a) Silicon disulfide

To write the formula for silicon disulfide, we need to identify the elements and their valences: - Silicon (Si) with a valence of 4 - Sulfur (S) with a valence of 2 Since there are two sulfur atoms in the molecule, the formula will be SiS2.

(b) Phosphine

To write the formula for phosphine, we need to identify the elements and their valences: -In this molecule, the elements are: - Phosphorus (P) with a valence of 3 - Hydrogen (H) with a valence of 1 The molecule consists of one phosphorus atom and three hydrogen atoms, so the formula will be PH3.

(c) Diphosphorus pentoxide

To write the formula for diphosphorus pentoxide, we need to identify the elements and their valences: -In this molecule, the elements are: - Phosphorus (P) with a valence of 3 - Oxygen (O) with a valence of 2 This molecule contains two phosphorus atoms and five oxygen atoms, so the formula will be P2O5.

(d) Radon tetrafluoride

To write the formula for radon tetrafluoride, we need to identify the elements and their valences: -In this molecule, the elements are: - Radon (Rn) with a valence of 2 - Fluorine (F) with a valence of 1 This molecule includes one radon atom and four fluorine atoms, so the formula will be RnF4.

(e) Nitrogen trichloride

To write the formula for nitrogen trichloride, we need to identify the elements and their valences: -In this molecule, the elements are: - Nitrogen (N) with a valence of 3 - Chlorine (Cl) with a valence of 1 There is one nitrogen atom and three chlorine atoms in the molecule, so the formula will be NCl3.