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 1.79 moles b 0.56 moles c 2.23 moles d 27.3 moles

Answer 1

The balanced chemical equation for the reaction is:

2C2H6 + 7O2 -> 4CO2 + 6H2O

From the equation, we can see that 2 moles of C2H6 react with 7 moles of O2. So, in order to find out how many moles of C2H6 are needed to completely react with 7.80 moles of O2, we can set up a proportion:

2 moles C2H6 / 7 moles O2 = x moles C2H6 / 7.80 moles O2

Solving for x, we get:

x = (2 moles C2H6 / 7 moles O2) * 7.80 moles O2
x = 2.23 moles

Therefore, the correct answer is c) 2.23 moles.