Final answer:
The amount of the unknown sample that can be recovered depends on its purity and the efficiency of the recovery process. If the process is 100% efficient, all of the measured mass can be recovered.
Step-by-step explanation:
To determine the amount of the unknown sample that is possible to recover, we need to consider the mass that was measured. Let's assume the measured mass is 4.8 g. The recovered amount depends on the purity and efficiency of the recovery process. If the process is 100% efficient, then all of the 4.8 g can be recovered. However, if there are losses during the recovery process, the recovered amount will be less than 4.8 g.