How could you break down the Calcium Carbonate into the elements that make it up

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 )

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.

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?