A container is filled with 0.8 M SiO2, 1.5 M HCl, 0.4 M SiCl4 and 0.9 M H2O and heated to 700oC where it reacts until equilibrium is reached: SiO2 (g) + 4HCl (g) ⇌ SiCl4 (g) + 2H2O (g) At equilibrium, it is determined that the concentration of H2O (g) is 1.3 M. Calculate the value of the equilibrium constant Kc for the reaction at this temperature.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;

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