C. Use Hess's law and the following equations to calculate Triangle H for the reaction SO2(g) + NO2(g) → SO3(g) + NO(g). (Show your work.)

•SO3(g) → SO(g) + 1/2O2(g)
Triangle H= -98.4 kJ/mol

•N2(g) + O2(g) → 2NO(g)
Triangle H= 180.6 kJ/mol

•NO2(g) →1/2N2(g) + O2(g)
Triangle H= -33.1 kJ/mol

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.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold