theresaeleanor theresaeleanor 31-01-2019 Chemistry contestada 1) Which of the following is the best example of a physical change? A) Sugar Dissolving in tea B) Firefly Glowing 2) In the combustion of ethane, what is/are the reactants? C2H6 + O2 ==> CO2 + H2O A) C2H6 and O2 B) CO2 and C2H6