A technique used to purify a substance by making a supersaturated solution and excluding impurities

A student attempts to separate 4.653 g of a sand/salt mixture just like you did in this lab. After carrying out the experiment, she recovers 2.772 g of sand and 0.858 g of salt. What was the percent composition of sand in the mixture according to the student’s data? No need to input '%'

A student attempts to separate 3.656 g of a sand/salt mixture just like you did in this lab. After carrying out the experiment, she recovers 2.174 g of sand and 0.626 g of salt. What was the percent recovery? No need to input '%'