Which substance will form a solution when mixed in liquid water?A.NH3(l)B.C5H12(l)C.SiO2(s)D.He(g)SUBMITarrow_backPREVIOUS

The substance that will form a solution when mixed in liquid water is A. NH3(l).

Here's why:

A. NH3(l) - Ammonia is a polar molecule, which means it has a net dipole as a result of the opposing charges from polar bonds arranged asymmetrically. Water is also a polar molecule, and "like dissolves like". Therefore, ammonia will dissolve in water.

B. C5H12(l) - This is pentane, a nonpolar molecule. Nonpolar molecules do not dissolve well in polar solvents like water.

C. SiO2(s) - This is silicon dioxide, a network covalent solid. These types of substances do not typically dissolve in water.

D. He(g) - Helium is a noble gas and is not known to form true solutions with water. It can be dispersed in water, but it will not dissolve.