Which of the following demonstrates that reactants and products are chemically different?

*Zn + 2HCl - 2HCl + Zn
*Zn + 2HCl - H2 + ZnCl2
*H2O + C4H10 - H2O + C4H10
*C4H10 + H2O - C4H10 + H2O

Question

Which of the following demonstrates that reactants and products are chemically different?

*Zn + 2HCl -> 2HCl + Zn
*Zn + 2HCl -> H2 + ZnCl2
*H2O + C4H10 -> H2O + C4H10
*C4H10 + H2O -> C4H10 + H2O

anonymous · Answer

"Chemically different" means that the compounds & elements on the left side are different from those on the right side. Which of these four reactions shows a different combination of atoms?

anonymous · Answer

ii have no idea. i need this Q too.

anonymous · Answer

Bump because i have no idea how to do this