A student used a respirometer containing potassium hydroxide (KOH\text{KOH}KOH) solution to measure the rate of aerobic respiration in a population of active woodlice (Oniscus asellus).
During an experiment lasting 4 hours4\text{ hours}4 hours, a sample of 15 g of woodlice absorbed 5.4 × 10-3 cm3 of oxygen.
Apart from time, identify two measurements the student would need to make to determine the volume of oxygen absorbed by the woodlice in cm3\text{cm}^3cm3.
Calculate the rate of oxygen uptake by these woodlice in cm3 g−1 hour−1\text{cm}^3\text{ g}^{-1}\text{ hour}^{-1}cm3 g−1 hour−1. Give your answer in standard form (scientific notation).
