Which of the following is a chemical reaction? a. the formation of a covalent bond between two amino acids. b. making a hydrogen bond between a water molecule and a sugar molecule. c. changing a carbon atom to a nitrogen atom by radioactive decay. d. the melting of ice.

1. list three scientific reasons cockroaches may fly.

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer