Harold422idn
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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

Sagot :

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: The correct answer is option 4.

Explanation:

[tex]2C+3H_2\rightarrow C_2H_6[/tex]

According to the reaction, 1 mol of [tex]C_2H_6[/tex] is obtained from 2 moles of C gives

Then, 2 moles of [tex]C_2H_6[/tex] will be obtained from:

[tex]\frac{2}{1}\times 2[/tex] moles of C =4 moles

Hence, the correct answer is option 4.

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