Which of the following is a combustion reaction? 2agno3 + h2s → ag2s + 2nho3 2h2o → 2h2 + o2 4fe + 3o2 → 2fe2o3 2al + n2 → 2ain

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

What is the percentage of hydrogen in c2h4

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?