How much work is done when a gas expands into a vaccuum?

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?