What is the ratio of Lead (IV) Oxide (PbI2) to Sodium Oxide (Na2O) ?

In a closed or isolated system , matter can not be created or destroyed. it can change forms but is conserved true or false

Different isotopes indicate that an element will have different numbers of

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)