Trini adds 10 g of baking soda to 100 g of vinegar. The mixture begins to bubble. When the bubbling stops, Trini finds the mass of the resulting mixture. She determines that the mass is 105 g.
How do you know that a chemical change has occurred?
Mass was destroyed when vinegar reacted with baking soda.
Mixtures are always less massive than their parts.
The substances reacted, producing gas.
Vinegar evaporated during the experiment.
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