Question

1. name the following ionic and molecular compounds:

a. n₂o₅
b. k₂so₄
c. no
d. n₂o₄
e. nacl
f. nh₃
g. mgo
h. nh₄oh
i. p₂o₅
j. cs₂

Explanation:

Part a: $\boldsymbol{N_2O_5}$

Step1: Identify the elements and their prefixes. For molecular compounds, use prefixes based on subscripts. Nitrogen (N) and oxygen (O). Subscript of N is 2 (di-), O is 5 (penta-).

Name: Dinitrogen pentoxide

Part b: $\boldsymbol{K_2SO_4}$

Step1: Identify cation (K⁺, potassium) and anion ($SO_4^{2-}$, sulfate). For ionic compounds, name cation first, then anion.

Name: Potassium sulfate

Part c: $\boldsymbol{NO}$

Step1: Molecular compound, N (nitrogen, subscript 1 - mono-), O (oxygen, subscript 1 - mono-; but "mono" is dropped for first element).

Name: Nitrogen monoxide

Part d: $\boldsymbol{N_2O_4}$

Step1: Molecular compound, N (di-), O (tetra-).

Name: Dinitrogen tetroxide

Part e: $\boldsymbol{NaCl}$

Step1: Ionic compound, Na⁺ (sodium), Cl⁻ (chloride).

Name: Sodium chloride

Part f: $\boldsymbol{NH_3}$

Step1: Molecular compound (common name is ammonia, or systematic: nitrogen trihydride, but ammonia is standard).

Name: Ammonia (or Nitrogen trihydride)

Part g: $\boldsymbol{MgO}$

Step1: Ionic compound, Mg²⁺ (magnesium), O²⁻ (oxide).

Name: Magnesium oxide

Part h: $\boldsymbol{NH_4OH}$ (Note: Correct formula is $\boldsymbol{NH_4OH}$ or $\boldsymbol{NH_3\cdot H_2O}$, but as given)

Step1: Ionic compound, $NH_4^+$ (ammonium), $OH^-$ (hydroxide).

Name: Ammonium hydroxide

Part i: $\boldsymbol{P_2O_5}$

Step1: Molecular compound, P (di-), O (penta-).

Name: Diphosphorus pentoxide

Part j: $\boldsymbol{CS_2}$

Step1: Molecular compound, C (carbon, subscript 1 - no prefix), S (sulfur, di-).

Name: Carbon disulfide

Answer:

s:
a. Dinitrogen pentoxide
b. Potassium sulfate
c. Nitrogen monoxide
d. Dinitrogen tetroxide
e. Sodium chloride
f. Ammonia (Nitrogen trihydride)
g. Magnesium oxide
h. Ammonium hydroxide
i. Diphosphorus pentoxide
j. Carbon disulfide