Which substance is a mixture?

A mixture is made from different substances that are not chemically joined. For example, powdered iron and powdered sulfur mixed together makes a mixture of iron and sulfur.

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Mixtures and compounds.

MixtureCompound

ExamplesAir, sea water, most rocksWater, carbon dioxide, magnesium oxide, sodium chloride

Explanation:

hope that helps :3

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3