An air sample in the lungs contains oxygen at 97 mmHg, nitrogen at 557 mmHg, carbon dioxide at 32 mmHg, and water vapor at 49 mmHg. What is the total pressure, in atmospheres, exerted by the gas mixture?

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)