The atoms that make up a molecule can be of the same element or different types. Diatomic molecules are a specific class of molecules that consist of two molecules of the same element. If the molecule is composed of atoms of at least two different elements, it is a chemical compound.
The cost of light rail construction varies widely, largely depending on the amount of tunneling and elevated structures required. A survey of North American light rail projects shows that costs of most LRT systems range from $15 million to over $100 million per mile.he cost of 17 miles (27 km) of highway improvements and 19 miles (31 km) of double-track light rail worked out to $19.3 million per highway lane-mile and $27.6 million per LRT track-mile. The project came in under budget and 22 months ahead of schedule.
Layback one is expected to provide a significant portion of the ore in 2000. Additional mining equipment, scheduled for delivery in mid-1999, will be used on layback one. Mining-Unit Costs The cost per ton for the month of December was $0.81 per ton reflecting the short haul distance to the crusher.For 1999 and beyond, mining cost per ton is expected to be in the range of $0.85 to $0.90.The depth of the pit and the height of the heap leach pad impact the truck-haul cycle time and unit cost, which is the most significant component of mining costs.Processing-Rates The crushing/processing rate is 21,500 tpd.ayback one is expected to provide a significant portion of the ore in 2000. Additional mining equipment, scheduled for delivery in mid-1999, will be used on layback one. Mining-Unit Costs The cost per ton for the month of December was $0.81 per ton reflecting the short haul distance to the crusher.