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