NYS Grade 8 Science Practice Questions - New York State Grade 8 Intermediate-Level Science Test Exam

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During a chemical reaction in a sealed container, the total mass of the substances is measured before and after the reaction. According to the law of conservation of mass, what should the measurement show?

The total mass stays the same before and after the reaction The total mass increases because new substances are made The total mass decreases because atoms are destroyed The total mass doubles because bonds are broken

Correct Answer:

The total mass stays the same before and after the reaction

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