Question

The following balanced equation shows the formation of ethane (C2H6).

C2H2 + 2H2 mc022-1.jpg C2H6


How many moles of hydrogen are needed to produce 13.78 mol of ethane?


1) 3.445 mol

2) 6.890 mol

3) 27.56 mol

4) 55.12 mol

Answer 1

mole ratio of ethane to hydrogen according to equation = 1 : 2
∴ moles of hydrogen = (moles of ethane) * 2
= (13.78 mol) * 2
= 27.56 mol

Option 3 is the answer

Answer 2

The number of moles of hydrogen needed to produce 13.78 moles of ethane is

27.56 moles

Step-by-step explanation

write a balanced chemical equation

that is C2H2+2H2→ C2H6

from the equation above 2 moles of H2 reacted to form 1 mole of C2H6(ethane)

therefore the mole ratio between H2 to C2H6 is 2:1 hence the mole of H2 = 2 x 13.78= 27.56 moles