Which of the following statements is true? Several variables of a gas often change simultaneously. One variable of a gas affects only one additional variable of the gas.

The true statement is:<br /><br />Several variables of a gas often change simultaneously.<br /><br />In the study of gases, variables such as pressure, volume, temperature, and the number of moles are interrelated. According to the ideal gas law (PV = nRT), changes in one variable can affect multiple other variables simultaneously. For example, if the temperature of a gas increases while the volume remains constant, the pressure will also increase. This demonstrates how several variables can change at the same time.