The compound bao absorbs water and carbon dioxide readily and is used to dry gases and organic solvents. what is its name?

The name of compound Bao that absorbs water and carbon dioxide  and readily used to dry gases and organic solvents is   Barium oxide

explanation

when naming  compounds   metal is named first followed by non metal

for this case Ba  is the symbol for Barium metal hence it  first name followed  oxide from symbol O .since  oxide  from oxygen  it is the second  name of the  compound  the ending is replaced with ide hence the word   barium oxide

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.