Which of the following is a product formed when H2SO4 decomposes?
H2,
SO4,
H2S,
H2O

- "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)."

the volume increases

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a