Question

a student investigated a sample of unknown gas. which statements represents an inference rather than an observation? when the gas is bubbled into a liquid, the liquid becomes cloudy. the unknown gas is carbon dioxide. the gas is colorless and odorless, and cannot be detected by human senses. the gas is not flammable. when a lit match is placed in the gas, the flame goes out.

Explanation:

An observation is a direct - perceived fact using the senses. An inference is a conclusion based on observations. The statements "The gas is colorless and odorless, and cannot be detected by human senses" and "When the gas is bubbled into a liquid, the liquid becomes cloudy" are observations. "The gas is not flammable. When a lit match is placed in the gas, the flame goes out" is an observation. "The unknown gas is carbon dioxide" is an inference as it is a conclusion drawn from the observations, not a direct - perceived fact.

Answer:

The unknown gas is carbon dioxide.