Pressurized Metal Gas Cylinders Are Generally Used to Store Commonly $\rarr$

Multiple Choice

Pressurized metal gas cylinders are generally used to store commonly used gases in the laboratory. At times, it can be easier to chemically prepare occasionally used gases. For example, oxygen gas can be prepared by heating
KMnO₄(s) according to the following chemical reaction:
2KMnO₄(s) $\rarr$ K₂MnO₄(s) + MnO₂(s) + O₂(g)
The above procedure was carried out starting with 93.2 g of KMnO₄, and it was later determined that all of the KMnO₄ reacted according to the above equation except 11.7 g. What was the percent yield for the reaction

A) 81.4% yield
B) 83.4% yield
C) 85.4% yield
D) 87.4% yield
E) None of the above are correct