Answer:
13 μg per milliliter.
Step-by-step explanation:
Given:
A certain food has a gluten ratio of 13 mg of gluten per liter of the food.
We know that:
1 L = 1000 milliliter
And 1 mg = 10⁻³ grams
Also, 1 microgram or μg = 10⁻⁶ grams
Therefore we can say that, 1 mg = 1000 μg
Hence, the gluten ratio in micrograms per milliliter is 13 μg/mL
