BF3 Properties


  1. Molecular Weight  : 67.82
  2. Density of gas       : 3.06 gm / litre at 0 deg C, 760mm of Hg 
  3. Density of Liquid  : 1.68 gm/cc @ -128 deg C
  4. Density of solid     : 1.87 gm/cc
  5. Melting Point        : -128 deg C
  6. Boiling Point         : -100 deg C
  7. Triple Point          : - 123 deg C   

The Cost of Oxygen!!


The cost of Oxygen. Very interesting!!!


In one day a human being breathes oxygen equivalent to three cylinders. 

Each oxygen cylinder on an average costs Rs 700, without subsidy. 

So in a day one uses Oxygen worth Rs 2100 and for a full year it is Rs 7,66,500. 

If we consider an average life span of 65 years; the costs of oxygen we use become a staggering sum of  Rs 500,00,000. Rs 50 million. 

All this oxygen is derived free of cost from the surrounding trees.. 

Very few people look at trees as a resource and there is rampart tree cutting going on everywhere which should stop.

Please pass this to your friends and care for trees.