Question

C2H2+2H2 yields C2H6

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

pls help

Answer 1

Answer: 27.56 moles of hydrogen

Step-by-step explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

`C_2H_2+2H_2\rightarrow C_2H_6`

According to stoichiometry:

1 mole of ethane is produced by = 2 moles of hydrogen

Thus 13.78 moles of ethane is produced by =
`(2)/(1)* 13.78=27.56` moles of hydrogen

27.56 moles of hydrogen are needed to produce 13.78 mol of ethane.

Answer 2

The balanced reaction that describes the reaction between hydrogen and acetylene to produce ethane is expressed 2H2 + C2H2 = C2H6. For 1 mole of ethane, there are 2 moles of hydrogen needed. Hence for 13.78 moles of ethane, there are 27.56 moles H2 needed.