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.
THE CHEMISTRY OF GLASS. MADE OF MOSTLY OF SILICON DIOXIDE. The main constituent of Flat Glass is SiO2 (silicon dioxide). This has a high melting temperature in the region of 1700 degrees C and its state at this temperature is like syrup on a very cold day.