Answer:
70.2 grams
Explanation:
The formula for density is p = m/V.
Here, p (density) and V (volume) are already given.
So, modify the formula to: m = pV.
p is 7.8 g/cm³, and V is 9 cm³.
m = 39/5 * 9/1
m = 351/5
m = 70.2 grams
The mass of the object is 70.2 grams.
