Asample of pure sodium-24 has an initial mass of 10.0 grams.  how many grams of sodium-24 will remain at the end of  4 half-lives? a.0.315 b.0.630 c.5.00 d.6.00

How much heat is released upon converting one mole of steam (18.0 g) from 100.0 ∘c to water at 25.0 ∘c? show work and constants, trying to figure out how it works. only given the heat capacity for steam and water so try to only use that

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

What causes most sediment to wash or fall into a river