Astudent mixes chemicals a and b together and records the amount of time it takes for a color change to occur. the student repeats the process 5 more times each time changing the amount of chemical b used in the mixture. the independent variable in this experiment is the:

It is mentioned that the student is mixing chemicals A and B and observes the time taken for the color to change. However, in the experiment, it is noticed that the student has repeated the procedure five times and each time he or she is modifying the concentration of chemical B. Thus, it is clear that the concentration of chemical B is the independent variable in the experiment. An independent variable is illustrated as the variable, which is controlled or modified in the experiment.

law of conservation of matter

the answer for sodium is 0.186

the answer for rubidium is 0.251