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nugget is 175 ml
145cm cubed
With the information given, the density of your nugget is about 19.29 g/cc. The density of gold is given as about 19.3 g/cc, so your nugget fits the density requirements for it to be a gold nugget.
15 ml
In fact, pyrite is heavier than gold. I'm not sure exactly, but I believe it is anywhere from 5% to 20% heavier than gold of the same volume.
The nugget of gold has a volume of 2.6 cm3, and the nugget of pyrite has a volume of 10 cm3.
Submerge it in water and determine the volume (in cubic centimeters) that it displaces. That will be the volume of the nugget.
145
Iron pyrite (FeS2) has a density of 4.8 to 5.0 grams per cm3. A piece of volume 40 cm3 would, therefore have a mass of volume*density = 192 to 200 grams.
nugget is 175 ml
Fill the graduated cylinder half full (may be more or less depending on the actual situation) and drop in the gold nugget. Read the final volume mark and subtract the initial volume from the final volume. This difference in volume is the volume of the nugget. This is related to the principle of buoyancy and it is said to have had a colourful story behind its discovery. Read the Wikipedia article on 'Eureka (word)' to learn more.
145cm cubed
With the information given, the density of your nugget is about 19.29 g/cc. The density of gold is given as about 19.3 g/cc, so your nugget fits the density requirements for it to be a gold nugget.
15 ml
The answer depends on what characteristic of the gold nugget you wish to measure: its mass, weight, volume, density, temperature, electrical conductivity, etc.
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.
In fact, pyrite is heavier than gold. I'm not sure exactly, but I believe it is anywhere from 5% to 20% heavier than gold of the same volume.