Answer: Volume of the flask is 31.34 mL.
Explanation:
Weight of empty flask [tex]w_1[/tex] = 56.12 grams
Weight of flask with water [tex]w_2[/tex] = 87.39 grams
Weight of water [tex]w_3[/tex] = [tex]w_2-w_1[/tex] = (87.39 - 56.12) grams= 31.27 grams
Density of water = 0.9976 g/mL
0.9976 grams are contained in = 1 ml of water
Thus 31.27 grams are contained in = [tex]\frac{1}{0.9976}\times 31.27=31.34[/tex] ml of water.
Thus the volume of the flask is 31.34 mL.