Chemistry, 18.11.2020 17:50 Bigman8518

As Mia mixed two substances in a test tube, she noticed that the test tube became warm. She also noticed gas coming from the test tube. Based on Mia's observations, what was most likely occurring inside the test tube? The two substances underwent a physical change
The two substances were melting
A new substance was forming
A change in the mass of the two substances
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