The model below shows the equation that represents how hydrogen and oxygen combine to form water. In this reaction, the properties of the product are the same as the properties of the reactants. 2H2 + O2 → 2H2O

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

explanation: no but i do not usually comment

2b2t

explanation:

2b2t