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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)
The reaction produced a gas that escaped the beaker.
The combined liquid was warmer than the two separate liquids.
The product contained fewer atoms than the reactants.
The reaction did not change the physical properties of the liquids.
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The reaction produced a gas that escaped the beaker.
Explanation: Mass is conserved overall, but if a gaseous product (or evaporated liquid) leaves the container the measured mass of the remaining contents will be lower even though total mass (including the gas) is unchanged.
Explanation: Mass is conserved overall, but if a gaseous product (or evaporated liquid) leaves the container the measured mass of the remaining contents will be lower even though total mass (including the gas) is unchanged.
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