What kind of circuit is the electric grid?

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

At element makes up all organic compounds?