What do the symbols in parenthesis indicate? c7h16 (l) + 11o2 (g) 7co2 (g) + 8h2o (l)

What is avogadro’s number, and why is it useful

Nonmetal halogen family atmoic mass 35

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)