Question

Given the balanced equation:

2C + 3H2==> C2H6
What is the total number of moles of C that must completely react to produce 2.0 moles of C2H6?
(1) 1.0 mol (3) 3.0 mol
(2) 2.0 mol (4) 4.0 mol

Answer 1

The answer is (4) 4.0 mol. This is a stoichiometry problem. You start with 2.0 mol of C2H6 and obtain the moles of C by multiplying 2.0 by the mole ratio, in this case 2. 2.0*2=4.0mol.

Answer 2

Answer: The correct answer is option 4.

Step-by-step explanation:

`2C+3H_2\rightarrow C_2H_6`

According to the reaction, 1 mol of
`C_2H_6` is obtained from 2 moles of C gives

Then, 2 moles of
`C_2H_6` will be obtained from:

`(2)/(1)* 2` moles of C =4 moles

Hence, the correct answer is option 4.