Density, Specific Weight, and Specific Gravity (Chapter 1) 15- The specific gravity of benzene is 0.876. Calculate its specific weight and its density in SI units. 16- Air at 16C and standard atmospheric pressure has a specific weight of 12.02N/m3. Calculate its density. 1.82 Carbon dioxide has a density of 1.964kg/m3 at 0C. Calculate its specific weight. 17- A certain medium lubricating oil has a specific weight of 8.860kN/m3 at 5C and 8.483kN/m3 at 50C. Calculate its specific gravity at each temperature. 18- At 100C mercury has a specific weight of I30.4kN/m3. What volume of the mercury would weigh 2. 25kN