Question

List the following substance in order from lowest density to highest density iron, gold, steel, water , air , silver and aluminum.

Answer 1

Answer : The order of density from lowest density to highest density will be:

water < air < aluminum < steel < iron < silver < gold

Explanation :

Density : It is defined as the mass contained per unit volume.

Formula for density :

$Density=\frac{Mass}{Volume}$

From this we conclude that, the density depends on mass and volume of substance.

As we know that the density is an intensive property because it does not depend upon the amount of substance. It remains same.

That means, for every substance the density always fixed. So,

The density of iron = 7.86 g/mL

The density of gold = 19.3 g/mL

The density of steel = 7.8 g/mL

The density of water = 1.00 g/mL

The density of air = 1.29 g/mL

The density of silver = 10.5 g/mL

The density of aluminium = 2.70 g/mL

From this we conclude that, the order of density from lowest density to highest density will be:

water < air < aluminum < steel < iron < silver < gold

Answer 2

H2O, O2, Al, Fe (iron), Ag (silver), and Au (gold). I dont know the chemical makeup of steel though.  Density is equivalent to mass over volume (d=m/v) so im guessing that all these you just listed are in the same quantity. I got these answers by the molar mass of these compounds/elements. Higher molar mass= higher density