Combining hydrogen and oxygen to make water is a physical change

How many moles are equivalent to 55.5g of nano3

Find the number of grams of hcl needed to react completely with .50 moles of 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 14.0 mol cesium fluoride with 14.0 mol xenon hexafluoride? csf(s) + xef6(s) csxef7(s)