Two elements that have the same properties as magnesium

One of the few xenon compounds that form is cesium xenon heptafluoride (csxef7). how many moles of csxef7 can be produced from the reaction of 13.0 mol cesium fluoride with 12.5 mol xenon hexafluoride? csf(s) + xef6(s) csxef7(s)

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Asolid that forms and separates from a liquid mixture is called