To convert ounces to grams, you can use the conversion factor that 1 ounce is approximately 28.3495 grams.
To convert 2.5 ounces to grams:
\[ 2.5 , \text{oz} \times 28.3495 , \text{g/oz} \approx 70.876 , \text{g} \]
So, 2.5 ounces is approximately 70.88 grams.