For 2.05 mol C 2 H 6 : What is the mole ratio between C 2 H 6 and O 2 in the balanced equation?

For 2.05 mol C2H6:

What is the mole ratio between C2H6 and O2 in the balanced equation?

2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g)

X =  _______mol O2

Y =  ________mol C2H6

Now, consider the following unbalanced equation:

C2H6(g) + O2(g) → CO2(g) + H2O(g)

Which amount requires more oxygen gas, 2.05 mol C2H6 or 29.3 g C2H6?

__________