When light hits a lens, what happens to the light?
a: reflects back to the light
b: refracts the light
to anyone for the !

If a solution contains 3 moles/liter of sodium chloride (nacl, made of sodium ions and chloride ions), what is the osmolarity of this solution

If a sample of radioactive isotopes takes 600 minutes to decay from 400 grams to 50 grams, what is the half-life of the isotope?

How many atoms are in 2 moles of phosphorus?