What does combining a nonmetal oxide with H2O typically yield?

Combining a nonmetal oxide with water (H2O) typically yields an oxo-acid. Nonmetal oxides, also known as acidic oxides, react with water to form acids. This occurs because the nonmetal oxide, when dissolved in water, forms a solution that contains ions capable of donating protons (H+ ions), characteristic of acids.

For example, when sulfur dioxide (a nonmetal oxide) reacts with water, it forms sulfurous acid (H2SO3). Similarly, carbon dioxide reacts with water to produce carbonic acid (H2CO3). These reactions exemplify the formation of oxo-acids from nonmetal oxides and demonstrate the underlying principle of how nonmetals typically behave when combined with water.

The other options represent different types of compounds not typically produced by the direct reaction of nonmetal oxides with water. Alcohols and ketones are organic compounds formed through different biochemical processes or reactions involving organic substrates, while salts generally result from the neutralization of acids with bases, not from the direct reaction of nonmetal oxides with water.