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Question 9

A student investigated the ventilation of a subject at rest using a spirometer. The spirometer chamber was filled with air, and soda lime was present to absorb any carbon dioxide exhaled.

At the start of the measurement (t=0t = 0t=0), the volume of air in the spirometer chamber was 3.80 dm33.80\text{ dm}^33.80 dm3. After 333 minutes, the volume of air in the chamber had decreased to 2.75 dm32.75\text{ dm}^32.75 dm3.

The subject had a mass of 72 kg72\text{ kg}72 kg.

Calculate the subject's oxygen consumption in cm3 kg−1\text{cm}^3\text{ kg}^{-1}cm3 kg−1 during this 333-minute period.

Give your answer to 222 significant figures.

[4]
Markscheme

Exchange surfaces Questions

  1. A Level
  2. /Biology
  3. /Exchange surfaces

34 exam-style questions on OCR A A Level Biology Exchange surfaces. Each one has a worked solution and a mark scheme showing where the marks go.

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