Using the following thermodynamic quantities at 25 °C CaO(s),o H f = -635.5 kJ mol-1, S°= +40.0 J mol-1 K-1 CaCO3(s),o H f= -1207 kJ mol-1, S°= +92.9 J mol-1 K-1 CO2(g),o H f= -394 kJ mol-1, S°= +213.6 J mol-1 K-1 (a) Calculate Delta G^0T for the reaction, CaCO3(s) CaO(s) + CO2(g) at 725 C. (b) What is the value of the equilibrium constant for this reaction at 725 C?

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

Show how to convert the temperature 84.7° c to kelvin. include all steps and label the final answer