Select the correct balanced chemical equation from the options g given below: Na2S03 (aq) + H2S04 (aq) → Na2S04 (aq) + H20 (1) + SO2 (g) O ( 2Na2S03 (aq) + H2S04 9aq) + 2Na2504 (aq) + H20 (1) + SO2 (g) O Na2S03 (aq) + 3H2SO4 (aq) → Na2SO4 (aq) + 3H20 (1) +S02 O 2Na2S03 (aq) + H2504 (aq) → Na2SO4 (aq) + H20 (1) + 2802 (9)​

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

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

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.