The densities of liquids vary some are less dense than water, whereas others are more dense. The densities of most metals are greater than that of water. Based on the information in Table 2.8, we can make some basic observations. Using these units, the density of water is given as 1.000 g/mL at 4☌. Recall from Table 2.1 that 1 mL = 1 cm 3. The densities of solids are usually given in grams per cubic centimeter (g/cm 3), the densities of gases in grams per liter (g/L), and the densities of liquids in grams per milliliter (g/mL). Table 2.8 lists the densities of some common solids and liquids under normal conditions. Density is a physical property that characterizes and identifies a particular kind of matter (see Figure 2.6). TABLE 2.7 Mass, volume, and density of iron samplesĪll samples of the same kind of matter under the same conditions have the same density. However, neither their masses nor their volumes show that all the samples are iron, but all the samples do have the same ratio of mass to volume, as is shown in the far right column. We can measure the mass and volume of a sample, as was done for several samples of iron with results shown in Table 2.7. Carbon and/or sulfur in the liquid outer core can induce compositional buoyancy that is relevant for the generation of magnetic field in Mercury's core.We have said that chemists determine the properties of matter, particularly those properties that help identify the composition of a sample. The lower Si core concentrations expected from a CB chondrite-like bulk composition for Mercury place less stringent requirements on the planet. High Si core concentrations, consistent with an EH chondrite-like bulk composition for Mercury, would require a high density of Mercury's mantle and a large inner core. We conclude that only limited concentrations of silicon, carbon, and sulfur can be present in Mercury's core. The experimental results are integrated in interior structure models of Mercury to examine the range of possible core compositions. ![]() This study presents experimental data that constrain the relation between density and composition of liquid Fe-Si-C metal alloys at pressures up to 5.8 GPa and temperatures of about 2000 K. Inferring Mercury's core composition from gravitational and rotational parameters requires a relation between density and composition of plausible core materials at high pressures and temperatures. Mercury's large core is critical for understanding Mercury's composition and magnetic field, which is driven by core convection. cm −3), less than 4 wt% Si in the core, and an inner core radius larger than 1,600 km. ![]() Interior structure models with the obliquity of Mercury near the lower observational uncertainty limit (1.96 arcmin) have a low-density mantle (2.88–3.03 g
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