A thief uses a bag of sand to replace a gold statue that sits on a weight sensitive alarmed pedestal. The bag of sand and the statue have exactly the same volume 1.75 L. Assume that the mass of the bag is negligible.

Question

A) calculate the mass. ( density of gold = 19.3 g/cm3

Answer 1

mass Au = volume x density
mass Au = 1.75*1000 mL x 19.3 g/mL = 33,775 grams or about 74 lbs.

The REAL question should be how much is th difference between sand and Au. Sand has a density of about 2.6 so
mass SiO2 = 1.75*1000*2.6 = 4,550 grams or about 10 lbs.
You could lift 10 lbs with one hand; I don't know about 74.