What is CF4+Br2--->CBr4+F2 balanced

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world

In the experiment you asked to react hydrochloric acid and with sodium hydroxide. when measuring the volume of the reactants, which instrument would give the greatest precision.