How many moles are represented by 86.5 g of Ca(OH)2?
*please help fast*

What is avogadro’s number, and why is it useful

Calculate the number of molecules present in 0.750 mol of mgo.

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.