Iron.
In terms of density, iron is the densest of the three, followed by water, and then carbon dioxide. Iron has a density of about 7.87 g/cm³, while water has a density of approximately 1 g/cm³ at standard conditions. Carbon dioxide, in its gaseous state at standard temperature and pressure, has a much lower density of about 0.00198 g/cm³. Therefore, the order from highest to lowest density is iron, water, and carbon dioxide.
A block of iron will float in mercury due to the higher density of iron compared to mercury. In water, the iron block will sink because the density of iron is higher than that of water. The buoyant force acting on the iron block is determined by the density of the surrounding fluid.
Iron has the greatest density, followed by granite, water, and then dry air. Density is the mass per unit volume of a substance, and iron has a higher mass per unit volume compared to granite, water, and dry air.
Iron sulfide (FeS) has a higher density than water, so it will sink in water.
Iron is more dense than silicon.
Iron is the most dense of the three substances. The density of iron is approximately 7.87 grams per cubic centimeter, while carbon dioxide is much less dense at about 1.98 grams per liter (at standard temperature and pressure), and water has a density of about 1 gram per cubic centimeter. Therefore, among iron, carbon dioxide, and water, iron is the densest material.
The density of iron is higher than that of water, so the iron nail sinks in water due to gravity pulling it downwards. The weight of the iron nail is greater than the buoyant force acting on it from the water, causing it to sink.
Iron is significantly denser than both carbon dioxide and water. The density of iron is about 7.87 grams per cubic centimeter, whereas water has a density of approximately 1 gram per cubic centimeter, and carbon dioxide is even less dense, around 0.00198 grams per cubic centimeter at standard conditions. Therefore, iron is much denser than both substances.
Iron has a higher density than water, so it sinks in water; but is less dense than mercury so it floats.
An example of a density higher than 1 is gold, which has a density of approximately 19.3 grams per cubic centimeter. This means that a given volume of gold is much heavier than the same volume of water or most other substances.
Iron has a higher density than aluminum
Iron typically contains small amounts of carbon, with most commercial iron containing less than 0.03% carbon. The amount of carbon present can affect the properties of the iron, with higher carbon content resulting in harder, more brittle iron.