PLSSS HELP THIS IS URGENT 1: moles of zinc nitrate
2: mass of ethane
3: mass of sodium oxide(g)
4: percentage yield(%)
5: atom economy(%)
6: volume of oxygen (cm3)
7: volume of hydrogen (cm3)
8: ratio of potassium to nitrogen
9: limiting reactant
10: mass of calcium chloride (g)
11: concentration of sulphuric acid (mol/dm3)
12: concentration of sulfuric acid (g/dm3)

EVEN IF YOU KNOW ONE ANSWER PLSS LMK

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 .