Last year, the House was in session for 118 days prior to Election Day and 135 days total. In total, Congress passed 65 laws, the fewest in history. With this almost non-existent work schedule, it appears that the record is not only in doubt but could be obliterated.
Rating Newest Oldest. Best Answer: Common glass contains about 70-72 weight % of silicon dioxide (SiO2). The major raw material is sand (or quartz sand) that contains almost 100% of crystalline silica in the form of quartz.
Mirror is simply made by taking a slab of plane glass then coating it on one planar side with a coating of silver which provides the reflecting part, but due to corrosive nture of silver the same side is coated with a layer of anti-corrosive paint to protect layer of mirror.