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In the reaction between a crushed antacid tablet and vinegar what gas is emitted

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.