Which reaction is balanced correctly

a. c + o2 → 2co2
b. ch4 + 4o2 → co2 + 2h2o
c. c3h8 + 5o2 → 3co2 + 4h2o
d. c6h12o6 + 3o2 → 6co2 + 6h2o

C3H8 + 5O2 → 3CO2 + 4H2O .

This reaction is balanced correctly because number of atoms on reactant side and product side are same.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.