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 $KMnO_{4}$ (s) according to the following chemical reaction: $2 KMnO_{4} (s) ? K_{2} MnO_{4} (s) + MnO_{2} (s) + O_{2} (g)$ How many grams of $KMnO_{4}$ would you need to produce $75 g$ of $O_{2}$ ? The molar mass of $KMnO_{4}$ is $158 g / mol$ .

Question

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

KMnO_{4}

(s) according to the following chemical reaction:

2 KMnO_{4} (s) ? K_{2} MnO_{4} (s) + MnO_{2} (s) + O_{2} (g)

How many grams of

KMnO_{4}

would you need to produce

75 g

of

O_{2}

? The molar mass of

KMnO_{4}

is

158 g / mol

.

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