Final answer:
Clarence prepared 56 kilograms of dough if he worked for 7 hours.
Step-by-step explanation:
To solve this problem using unit rates, we can first find how many kilograms of dough Clarence prepared in 1 hour. We can do this by dividing the amount of dough prepared by the number of hours worked: 16 kg / 2 hours = 8 kg/hour. Now, we can use this unit rate to find how much dough Clarence prepared in 7 hours: 8 kg/hour * 7 hours = 56 kilograms. Therefore, Clarence prepared 56 kilograms of dough if he worked for 7 hours.