In a chemical reaction, what happens to the total number of each type of atom?

What is the formula for the molecular compound nitrogen monoxide

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

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