How is it possible that the products and the reactants of these chemical reactions are the same, but the wood has a flame and your body does not?

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)

What is the percent by mass of oxygen in fe2o3

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2