If 17.50 grams of a barium sulfate precipitate are produced, find the number of moles of Barium Nitrate that
reacted.
CaSO4 (aq) + Ba(NO3)2 (aq) --> BaSO4 (s) + Ca(NO3)2

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

mark brainliest and have a great day!

it is the most commonly accepted one

i think it's letter a.