Signs that a chemical reaction is occurring are: 1. change in color 2. change in odor 3. change in pH, as in changes from acid to base or base to acid
True I think is the answer
<span>What type of reaction is shown below?
2H2O2 → 2H2O + O2
A. synthesis
B. decomposition
C. combustion</span>decomposition
answer is B
Answer:
crust, mantle, inner core, outer core
