Question

1. a substance that is formed by a chemical reaction is called a

a) mole.

b) product.

c) coefficient.

d) reactant.

Explanation:

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<reasoning>

Identify the definition of a substance formed by a chemical reaction

\[
\text{Reactants}
ightarrow \text{Products}
\]

Evaluate the given options

• A) mole: A unit of measurement for amount of substance.
• B) product: A substance formed as a result of a chemical reaction.
• C) coefficient: A number placed in front of a chemical formula in an equation.
• D) reactant: A starting substance that undergoes change during a reaction.

</reasoning>

<answer>
<mcq-option>(A) mole.</mcq-option>
<mcq-correct>(B) product.</mcq-correct>
<mcq-option>(C) coefficient.</mcq-option>
<mcq-option>(D) reactant.</mcq-option>
</answer>

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"question_type": "Multiple Choice",
"knowledge_point": [
"Natural Science",
"Chemistry",
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]
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Answer:

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</pre_analysis>

<reasoning>

Identify the definition of a substance formed by a chemical reaction

\[
\text{Reactants}
ightarrow \text{Products}
\]

Evaluate the given options

• A) mole: A unit of measurement for amount of substance.
• B) product: A substance formed as a result of a chemical reaction.
• C) coefficient: A number placed in front of a chemical formula in an equation.
• D) reactant: A starting substance that undergoes change during a reaction.

</reasoning>

<answer>
<mcq-option>(A) mole.</mcq-option>
<mcq-correct>(B) product.</mcq-correct>
<mcq-option>(C) coefficient.</mcq-option>
<mcq-option>(D) reactant.</mcq-option>
</answer>

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"Chemistry",
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