The heat of fusion is the amount of heat required to melt 1g of solid into liquid evaporate 1g of liquid into gas make material combust make a substance sublimate

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?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .