A student investigated the rate of aerobic respiration in germinating mung beans (Vigna radiata) using a simple respirometer.
The germinating seeds were placed in a boiling tube connected to a capillary tube containing a colored indicator droplet. Potassium hydroxide solution was placed in the boiling tube to absorb any carbon dioxide produced, so that any pressure change was solely due to oxygen uptake.
At the start of the experiment (t=0t = 0t=0), the student recorded the position of the right edge of the indicator droplet as 1.8 cm1.8\text{ cm}1.8 cm on the ruler. The respirometer was placed in a water bath at 25∘C25^\circ\text{C}25∘C for 40 minutes40\text{ minutes}40 minutes.
The diagram below shows the final position of the indicator droplet and the centimeter ruler.
Use this information to calculate the rate of oxygen consumption in mm s−1\text{mm s}^{-1}mm s−1.
Give your answer in standard form and to 222 significant figures. Show your working.
