Question

HURRY

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2A + 5B --> 3C + D

2.0 mol A and 4.0 mol B react to form 1.8 mol C. What is the PERCENT YIELD of this reaction?

Answer 1

Percent yield of reaction is 75%.

Step-by-step explanation:

Given data:

Moles of A = 2.0 mol

Moles of B = 4.0 mol

Moles of C formed = 1.8 mol

Percent yield of reaction = ?

Solution:

Chemical equation:

2A + 5B → 3C + D

We will compare the moles of A and B with C from balance chemical equation.

A : C

2 : 3

B : C

5 : 3

4 : 3/5×4 = 2.4 mol

Number of moles of C formed by 4 moles B are less thus B is limiting reactant and will limit the yield of C.

Percent yield:

Percent yield = actual yield /theoretical yield × 100

Percent yield = 1.8 mol / 2.4 × 100

Percent yield =75%