A student performing an experiment to study the mixing of non-reactive gases tra
ID: 850747 • Letter: A
Question
A student performing an experiment to study the mixing of non-reactive gases transferred carefully measured volumes of nitrogen and oxygen gases in random order into a gas measuring tube and recorded the resulting volume. All volumes were measured and plotted in mL. Why is a random order of addition a useful experimental design decision?
There is no experimental purpose in randomizing the order in which the gases are added.
It will help balance the additions because nitrogen and oxygen have different molar masses.
It will make the measurements go faster as random additions do not have to be recorded as carefully.
It will help avoid shortcuts that can bias the results by making the student slow down and carefully record both the gas being added and the volume added.
There is no experimental purpose in randomizing the order in which the gases are added.
It will help balance the additions because nitrogen and oxygen have different molar masses.
It will make the measurements go faster as random additions do not have to be recorded as carefully.
It will help avoid shortcuts that can bias the results by making the student slow down and carefully record both the gas being added and the volume added.
Explanation / Answer
It will help avoid shortcuts that can bias the results by making the student slow down and carefully record both the gas being added and the volume added.
It will help avoid shortcuts that can bias the results by making the student slow down and carefully record both the gas being added and the volume added.
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