Youâll need to have a vehicle expense policy in place before that happens. While you can reimburse your employees for mileage in personal vehicles in any manner you choose, most companies develop a system based loosely on the Internal Revenue Serviceâs guidelines for mileage and fuel reimbursements.
Best Answer: lead is found in archeological digs dating over 5000 years ago which means that people knew how to refine it before the pyriamid in Egypt were built. IT was probably discovered by accident when people built it a very hot fire for cooking and it melted the lead that was in the rocks. The mineral that contains lead is galena is commonly found around the world.
Historically, the main molybdenum ore now called molybdenite was often confused with graphite or galena, the ore of lead. (Molybdos is Greek for lead.) In 1778, Swedish chemist Carl Wilhelm Scheele determined that molybdenite contained the sulfide of a new metal.This metal was isolated five years later.olybdenum ore is mined alone (40%) or as a secondary metal with copper (60%). In either case, it is always accompanied by small amounts of rhenium, which can also be extracted and sold. Molybdenite is molybdenum sulfide.