When surface water dissolves carbon dioxide, carbonic acid is formed, H2CO3. Given 283.8 grams of water, how many grams of carbonic acid are formed? ___H2O + ___CO2 ___H2CO3.

Solid tin exists in two forms: white and gray. for the transformation sn(s, white) → sn(s, gray) the enthalpy change is -2.1 kj/mol and the entropy change is -7.4 j/(mol*k). a. calculate the gibbs free energy change for the conversion of 1.00 mol white tin to gray tin at -30℃. b. will white tin convert spontaneously to gray tin at -30℃? c. at what temperature are white and gray tin thermodynamically equivalent at a pressure of 1 atm?