10001/999900
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To find the mass of 3.0 ml of gold, we can use the density of gold, which is approximately 19.32 grams per cubic centimeter (g/cm³). Since 1 ml is equivalent to 1 cm³, the mass can be calculated as follows: mass = density × volume = 19.32 g/cm³ × 3.0 cm³ = 57.96 grams. Therefore, 3.0 ml of gold has a mass of approximately 58 grams.
Since gold is 19.32 grams per ml and water is 1 gram per ml they both have the same mass
Assuming the gold nugget is solid and pure (unlikely in real life!) The volume of the nugget is 77.0 - 50.0 mL = 27.0 mL So density = mass/volume = 521/27.0 = 19.3 g per mL.
The density of water at 20 deg C (and at a pressure of 1 atmosphere) is 0.99820 so the mass is 250*0.99820 = 249.55 grams.
250 mL is a better bet.