To calculate the density of the apple juice, you will use the formula:
\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]
Given the mass of the apple juice is 0.25 kg and the volume is 320 cm³, we can convert the mass to grams:
\[ 0.25 , \text{kg} = 250 , \text{g} \]
Now, using the formula:
\[ \text{Density} = \frac{250 , \text{g}}{320 , \text{cm}^3} = 0.78125 , \text{g/cm}^3 \]
This value can be rounded to 0.78 g/cm³.
Thus, the correct response is:
0.78 g/cm³.