Hello, JohannaSalmeron!
Set up proportions for the problem:
1 pound 4.5 pounds
________ x ___________
16 ounces x ounces
Cross multiply and solve for x.
x= 16 x 4.5
x= 72 ounces
So false, the recipe would call for 72 ounces of rice.
Answer: False
Hope this helps :)