Question 14 (2 points)
How many moles of C2H6 are needed to completely react with 7.80 moles of O2 according to the above equation?
If you are unsure how to do a mole to mole conversion, please see the example problem linked HERE.
a
2.23 moles
b
0.56 moles
c
1.79 moles
d
27.3 moles
c) 1.79 moles
To determine how many moles of C2H6 are needed to react with 7.80 moles of O2, we first need to use the balanced chemical equation to determine the mole ratio between O2 and C2H6.
From the balanced chemical equation: 2 C2H6 + 7 O2 -> 4 CO2 + 6 H2O
The mole ratio between O2 and C2H6 is 7:2.
Therefore, to calculate the moles of C2H6 needed, we can set up a proportion:
7.80 moles O2 / 1 x (2 moles C2H6 / 7 moles O2) = 1.79 moles C2H6
Therefore, 1.79 moles of C2H6 are needed to completely react with 7.80 moles of O2.