What do you call the ability of a gas to completely spread out and mix with other substances?

V1t2 = v2t1 is an expression of who’s law

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

What material does not melt at any temperature