What is the number of moles in 78.4 l of neon at stp?
a. 2.75 moles
b. 3.50 moles
c. 4.25 moles
d. 4.50 moles

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

Which of these conditions most likely produces an unstable isotope?

What atom has the largest atomic radius