A chemist fills a reaction vessel with 6.74 atm hydrogen (H2) gas, 4.52 atm oxygen (O2) gas, and 8.21 atm water (H, gas at a temperature of 25.0°C. Under these conditions, calculate the reaction free energy AG for the following chemical reaction:
2H2(g) +0,(8) -2H,0(g)
Use the thermodynamic information in the ALEKS Data tab.

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.

yes the answer is total mass in unchanged   : )