(ii) Explain how carbon dioxide and ammonia are formed during decomposition of cow pat.
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Carbon dioxide is produced whenever an acid reacts with a carbonate. This makes carbon dioxide easy to make in the laboratory. Calcium carbonate and hydrochloric acid are usually used because they are cheap and easy to obtain. Carbon dioxide can be collected over water, as shown in the diagram.

Thats just a thought though.

answer; atp and nadph;