BRAINLIEST HELP PLEASE. 6. In order to produce CO2, a student put a sample of calcium carbonate in a flask and added hydrochloric acid using the following equation:
CaCO3 + 2HCI- H2O + CO2 + CaCl2
The student finds the mass of CO2 generated in the lab to be 100 g. If the student
began with 200 g of HCl and excess CaCO3, what was the percent yield of CO2?

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 .