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Question
A student combines two liquids in a beaker. She observes that the mass of the combined liquid is less than the mass of the two separate liquids. The student claims that this observation shows that matter is not conserved in chemical reactions. Which statement explains why the student’s claim is incorrect?(1 point)
Responses
The product contained fewer atoms than the reactants.
The product contained fewer atoms than the reactants.
The reaction produced a gas that escaped the beaker.
The reaction produced a gas that escaped the beaker.
The combined liquid was warmer than the two separate liquids.
The combined liquid was warmer than the two separate liquids.
The reaction did not change the physical properties of the liquids
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The correct statement that explains why the student’s claim is incorrect is:
The reaction produced a gas that escaped the beaker.
This response indicates that some of the mass is not accounted for because it has turned into a gas and left the system, which aligns with the Law of Conservation of Matter that states matter cannot be created or destroyed, only transformed. The other options do not accurately explain the loss of mass in this context.
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