What is the mole fraction of NaOH in an aqueous solution that contains 35.0% by mass?

One similarity and one difference between an element and a mixture of elements

Which proportionality applies to avogadro’s law?

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.