How many oxygen atoms are in the product h2co3 h2o+co2

The answer is 6 Oxygen molecules or atoms.

H₂CO₃H₂O has 4 oxygen atoms, and CO₂ has 2 oxygen atoms. So, there is a total of 6 oxygen atoms. Hope this helps!

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.