When is gas behavior most ideal?

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?