Answer: 8 moles Explanation: Nc2H6= 4 mol 2C2H6 + 7O2 → 4CO2+6H2O CO2=4/2⋅4 NCO2= 8 moles ( I write this on paper so the letters and format might be confusing) sorry!!
hen the number of neutrons is known and the atomic number of an element is known, it becomes easier to determine the approximate mass number by adding the two.