A) Compute linear density values for [100] for silver (Ag). Express your answer in nm-1. Round off the answer to three significant figures. (Only Two numbers after comma, no units)B) Compute planar density value for (100) plane for chromium (Cr). Express your answer in nm-2. Round off the answer to four significant figures. (Only two numbers after comma, no units).

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .