How do hydroelectric dams emit greenhouse gases like methane without burning any fossil fuels?

Explanation for basic character?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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.