A student is given a sample of aluminum metal at her laboratory station. She is instructed to measure the mass of the sample and determines that it has a mass of
34.2 grams. Approximately how many moles of aluminum are in this student's sample?

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

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.

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene