During an experiment, mr. lehman tells his students to be alert for signs that an endothermic reaction is happening. which of the following scenarios would his students most likely observe? a test tube becomes cool to the touch. a liquid appears to glow. a new odor comes from a beaker. a solid forms from a mixture of solutions.
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During an experiment, mr. lehman tells his students to be alert for signs that an endothermic reacti...
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