Question

C. Which of the following figures best 81. A chemical reaction has the equation: 2A + B illustrates a stoichiometric ratio of A and B? @ @ 1 III. © A) I only B) II only C) III only D) IV only E) both I and IV ANS: E PTS: 1 DIF: Easy REF: 3.1

Answer 1

The chemical equation as follows;

2A + B -----> C

The number of moles of A is double of the number of moles of B

Number of moles of A and B in each figure is as follows:

I:

number of moles of A = 8

Number of moles of B = 4

Here the number of moles of A is double of B.

So it is correct option

II:

number of moles of A = 8

Number of moles of B = 8

Here the number of moles of A is equal to B

So it is not a correct option

III)

number of moles of A = 4

Number of moles of B = 8

Here the number of moles of A is half of number of moles of B

So it is not a correct option.

IV)

number of moles of A = 4

Number of moles of B = B

Here the number of moles of A is half of B.

So it is not a correct option.

Therefore, the correct option is (A) I only