Final answer:
The Apollo 16 mission collected approximately 211 pounds of lunar rocks and soil during their expedition.
Step-by-step explanation:
The astronauts of Apollo 16 endured the arduous and historic task of collecting samples from the Moon's surface. They amassed nearly 400 kilograms of lunar rock and soil during their mission. To provide a direct answer to the student's question, they collected 211 pounds (95.25 kilograms) of Moon rocks and regolith, a significant contribution to our understanding of lunar geology.