a student prepared a graph of the results from an experiment where no(g) was added in small increments to a measuring tube containing oxygen gas. the student plotted the total volume of gas in the measuring tube as the dependent variable on the y axis and the total volume of no(g) as the independent variable along the x axis. all volumes were measured and plotted in milliliters of the respective gas. the plot shows a linear trend with a negative slope. select the statement that gives the best interpretation of the negative slope observed in this experiment.
As NO(g) is added the volume of NO(g) is increasing.
As NO(g) is added the volume of oxygen in the measuring tube is decreasing.
The volume of NO(g) is increasing.
The volume of oxygen in the measuring tube is decreasing.