Answer: 22.4L
Gas at STP means gas at standard temperature and pressure of one mole of an ideal gas
Ideal gas Law PV=nRT
Standard pressure is 1atm or 22.4L
Standard temperature is 273.15K
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is a reducing agent, 
is an oxidizing agent.
<h3>What is an oxidizing agent?</h3>
An oxidizing agent is a substance that causes oxidation by accepting electrons.
Al is a reducing agent, is an oxidizing agent.
Hence, option C is correct.
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The study and understanding of the biological macromolecules impact our everyday life by making us know what to eat and the different processes which occur in the body.
<h3>What are Biological macromolecules?</h3>
These are cellular components of the body which are natural and vital for the growth and survival of organisms.
Examples include carbohydrates, protein etc which contain nutrients vital for our daily life.
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B: Acids that’s the right answer
