A calorimetry experiment determined that the combustion of 1.01 g of H2(g) reacting with excess O2(g) gave qsoln = 143 kJ. Calculate ΔH for the reaction: H2(g) + ½ O2(g) → H2O (l)

Achemist who studies water samples did a demonstration of how to test for lead in water. she added a clear solution of potassium iodide to a clear solution of lead nitrate. then a yellow swirling solid formed in the liquid. what is most likely true about the yellow solid?