Select the correct formula for sulfur hexafluoride. f6s2 f6so3 sf6 s2f6

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 )

What is the mass of sodium in 3 moles of sodium chloride

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.