Table 4.4 Densities of Some Common Substances Mass Density, Weight Density, Specific Substance Type* D (kg/m') Dwy (1b/ft3) Gravity Solids Styrofoam m 37 2.3 0.037 Juniper wood m 560 35 0.56 Ice C 917 57.2 0.917 Ebony wood m 1,200 75 1.2 Concrete m 2,500 156 2.5 Aluminum e 2,700 168 2.7 Granite m 2,700 168 2.7 Diamond e 3,400 210 3.4 Iron e 7,860 490 7.86 Brass m 8,500 530 8.5 Nickel e 8,900 655 8.9 Copper e 8,930 557 8.93 Silver e 10,500 655 10.5 Lead e 11,340 708 11.34 Uranium e 19,000 1,190 19 Gold e 19,300 1,200 19.3 Liquids Gasoline m 680 42 0.68 Ethyl alcohol C 791 49 0.791 Water (pure) C 1,000 62.4 1.00 Seawater m 1,030 64.3 1.03 Antifreeze m 1,100 67 1.1 Sulfuric acid C 1,830 114 1.83 Mercury 13,600 849 13.6 Gases (at 0 C and 1 atm) Hydrogen e 0.09 0.0056 0.00009 Helium e 0.18 0.011 0.00018 Nitrogen (N,) C 1.25 0.078 0.00125