What condition must be met in order for there to be a balance between reactants and products

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 )

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

How do you lengthen a pattern piece? (family and consumer science, sewing)