Question

question 1 - 2
the primary dissolved gases in water are oxygen (o₂), nitrogen (n₂) and carbon dioxide (co₂) which are present in varying amounts depending on the water source and environmental conditions
which of the following best describes a solution of dissolved gasses in water?
homogeneous mixture
heterogeneous mixture
pure substance
elements

Explanation:

A homogeneous mixture has a uniform composition throughout. In a solution of dissolved gases in water, the gases (like \(O_2\), \(N_2\), \(CO_2\)) are uniformly distributed at a molecular level in the water. A heterogeneous mixture has visibly different parts. A pure substance has a fixed composition (either an element or a compound, not a combination like this gas - water solution). Elements are pure substances made of only one type of atom.

Answer:

homogeneous mixture