Question

the following results of a scientific study on water were found in a chemistry handbook.
properties of water
molar mass: 18.015 g/mole
melting point: 0.0°c
boiling point: 100.0°c
vapor pressure of water graph with x - axis temperature (°c) and y - axis vapor pressure (mm hg)
what is the independent variable in the study?
options: vapor pressure, molar mass, temperature, melting point

Explanation:

In a scientific study, the independent variable is the one that is manipulated or changed to observe its effect on another variable (dependent variable). In the vapor pressure of water graph, temperature is on the x - axis, which is typically the independent variable as it is the factor that is varied to see how it affects vapor pressure (dependent variable, on y - axis). Molar mass, melting point are constants or not the variable being manipulated here, and vapor pressure is the dependent variable.

Answer:

C. temperature (assuming the options are labeled as A. vapor pressure, B. molar mass, C. temperature, D. melting point)