What is the mass percent of sand in a mixture of 5.9 g of sand in 3.2 g of water?

Answer 1

mass percent is mass of component/total mass (x100%). In this case we have a total mass of

5.9 g + 3.2 g = 9.1 g. Thus, the % by mass of sand = 5.9 g/9.1 g (x100%) = 64.8%