False. The mass of the marshmallow went down by 1.43 grams, but this does not mean that 1.43 grams of atoms disappeared and no longer exist. According to the law of conservation of mass, mass cannot be created or destroyed in a chemical reaction. Instead, the decrease in mass could be due to the loss of water vapor or other volatile substances, which simply left the marshmallow. The atoms are still present; they have just changed state or been released into the environment.
In the previous question, the marshmallow's mass was 25.21 g at the beginning but 23.78 g at the end. True or False. The mass went down by 1.43 grams because 1.43 grams of atoms disappeared and no longer exist.
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