Write a balanced chemical equation for the reaction of acetone (c3h6o) with oxygen (o2) to form carbon dioxide (co2) and water (h2o). select one: a. c3h6o + 4 o2 ® 3 co2 + 3 h2o. b. 3 co2 + 3 h2o ® c3h6o + 4 o2. c. 6 c3h6o + 8 o2 ® 6 co2 + 6 h2o. d. c3h6o + o2 ® co2 + h2o.

The balanced equation for this reaction is  
C3H6O + 4 O4 → 3CO2 + 3H2O
but you should how to balance the original equation:
the original equation was C3H6O + O4 → CO2 + H2O
to be the equation balanced we have to make each number of the atom is equal on each side of the equation.
1) first, we start with C atom in the original equation it was 3 atom in the right side and 1 atom in the left side so we put 3CO2 instead of CO2 in the right side to make the C atoms number is equal in both sides.
the equation becomes C3H6O + O2 → 3CO2 + H2O
2) second, the H atom, it was 6 atom in the left side and only 2 in the right side so we put 3H2O instead of H2O to make it equals each other in both sides.
the equation becomes C3H6O + O2 → 3 CO2 + 3H2O
3) finally, the O atom, it was 4 atom in the right side and 9 atoms in the left side so we put 4 O2 instead of O2 to make it equals each other in both sides

so we get the final balanced equation is
C3H6O + 4O2 → 3CO2 +3H2O

The correct answer is d