Please help me thanks so much!?!?

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Ihat will happen if i added baking soda to vinegar

What does the cell nucleus do or, how does it function?