We’re being asked to calculate the mass percent when 18.9 g solid is dissolved in 39.5 g water.
We’re given the mass percent of the solution and we're going to use the mass percent formula shown below:
Since we are dealing with a solution, we can rewrite the equation as:
Calculate the mass of mass percent solid:
What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water?
D) The identity of the compound must be known.
E) none of the above