AzSCI Grade 8 Practice Questions - Arizona Science Assessment (AzSCI) - Grade 8 Exam

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In a sealed container, baking soda and vinegar react and produce a gas. The total mass of the sealed container and its contents is measured before and after. What should the measurements show?

Total mass doubles because two substances react. Total mass stays the same because atoms are rearranged, not created or destroyed. Total mass increases because gas is produced. Total mass decreases because the solid baking soda seems to disappear.

Correct Answer:

Total mass stays the same because atoms are rearranged, not created or destroyed.

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