Coal gasification can be represented by the equation: 2 C(s) + 2 H2O(g) ĻCH4(g) + CO2(g) ǼH = ? Use the following information to find ǼH for the reaction above. CO(g) + H2(g) ĻC(s) + H2O(g) ǼH = -131 kJ CO (g) + H2O(g) ĻCO2(g) + H2(g) ǼH = -41 kJ CO(g) + 3 H2(g) ĻCH4(g) + H2O(g) ǼH = -206 kJ

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]