show how to work it out... How many molecules of Mg3N2 (magnesium nitride) are formed when excess Mg (magnesium) reacts with 24.3 moles of N2 (nitrogen gas)? 3Mg(s) + N2(g) → Mg3N2(s) 43.1 molecules Mg3N2​

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explanation:

gold is my favorite solid.

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

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