CT NGSS Science Grade 8 Practice Questions - Connecticut NGSS Science Assessment - Grade 8 Exam

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A sealed reaction chamber holds 12.0 g of reactants before a reaction. After the reaction, the chamber still contains only products of that reaction. What total mass of products is expected if no mass leaves or enters?

0.0 g because mass is destroyed in reactions 12.0 g 24.0 g because reactions always double mass 6.0 g because half the mass becomes energy waves

Correct Answer:

12.0 g

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