There are two types of fermentation aerobic and anaerobic. Aerobic are those that need oxygen to ferment while anaerobic are those who do not need oxygen. Products of fermentation are usually water, ethanol, lactic acid and carbon dioxide. Other products are acetone and butyric acid.
B) oxygen, because oxygen is the only element that is in both chemical formulas.
Answer:
Increasing its mass to twice its original value
Explanation:
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