Question

How many molecules of H2O are produced when 75 molecules of H2O2 react according to the balanced chemical reaction below?

6 H+(aq) + 2 MnO4- (aq) + 5 H2O2(l) ------- 2 Mn2+(aq) + 5 O2(g) + 8 H2O(l)

a. 8 molecules
b. 13 molecules
c. 75 molecules
d. 120 molecules
e. 150 molecules

Answer 1

Answer:

The answer to your question is the letter d. 120 molecules

Explanation:

Data

molecules of H₂O = ?

molecules of H₂O₂ = 75

Balanced chemical reaction

       6H⁺ + 2MnO₄⁻  + 5H₂O₂  ⇒   2 Mn²⁺  +  5 O₂  +  8 H₂O

Process

-To find the answer use the coefficients of H₂O₂ and H₂O.

Also, solve the problem using proportions and cross multiplication

                5 moles of H₂O₂ ------------------ 8 moles of H₂O

              75 moles of H₂O₂ ------------------ x

                x = (75 x 8) / 5

                x = 600 / 5

-Result

                x = 120 molecules