PLS HELP The average atomic mass of carbon is 12.01 amu. Based on the atomic masses of the two isotopes of carbon, how do the relative abundances of the
isotopes compare?

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

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