CCRA Science Grade 11 Practice Questions - Oklahoma College- And Career-Readiness Assessment Science Content, Grade 11 Exam

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According to the Law of Conservation of Mass, what must be true about a closed system during a synthesis reaction between iron and sulfur (Fe + S -> FeS)?

The total mass of iron sulfide produced equals the combined mass of iron and sulfur reacted The total mass of the system increases because a compound is formed The total mass decreases because energy is converted into mass The mass of iron decreases while the mass of sulfur triples during bonding

Correct Answer:

The total mass of iron sulfide produced equals the combined mass of iron and sulfur reacted

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