Question

why are there often holes in slices of bread? the holes are created by bubbles of carbon dioxide gas (co₂) that form in the bread dough before and during baking. these bubbles form when single - celled organisms called yeast break down glucose (c₆h₁₂o₆), a sugar in flour. in addition to carbon dioxide gas, a substance called ethanol (c₂h₆o) forms during this process.

in the chemical reaction described in the passage, which of the following are reactants? select all that apply.

• glucose (c₆h₁₂o₆)
• ethanol (c₂h₆o)
• carbon dioxide (co₂)

Explanation:

Reactants are the starting substances in a chemical reaction that get converted into products. The passage states yeast breaks down glucose to produce carbon dioxide and ethanol. So glucose is the reactant, while ethanol and carbon dioxide are the products.

Answer:

glucose ($\text{C}_6\text{H}_{12}\text{O}_6$)