## Introduction

In order to calculate the per cent by mass of potassium in k3fecn6, we first need to determine the molar mass of potassium. The molar mass of an element is the mass of one mole of atoms of that element. Potassium has a molar mass of 39.0983 g/mol. This means that one mole of potassium atoms has a mass of 39.0983 grams.

Now that we know the molar mass of potassium, we can calculate the percent by mass of potassium in k3fecn6. To do this, we need to determine the number of moles of potassium atoms in k3fecn6. We can do this by dividing the total mass of k3fecn6 by the molar mass of potassium. This gives us a value of 0.0758 moles for the number of moles of potassium atoms in k3fecn6.

Now that we know both the molar mass and the number of moles, we can calculate the percent bymassofpotassiumink3fecn6 usingthe following equation:

percentbymassofpotassiumink3fecn6= (numberofmolesofpotassium * 100) / (totalmassofk3fecn6)

plugginginourvaluesandperformingthecalculationgivesusapercentbymassof2.195%potassiumink3fecn6.

## What is the percent by mass of potassium in k3fecn6?

There are many different ways to determine the percent by mass of potassium in k3fecn6, but the most common method is to use the molar mass of potassium. The molar mass of potassium is 39.0983 g/mol. To find the percent by mass of potassium, divide the molar mass of potassium by the molar mass of k3fecn6.

### Theoretical yield

In order to calculate the percent by mass of potassium in k3fecn6, we need to know the theoretical yield. This is the maximum amount of product that can be produced from a given reactant. In this case, the reactant is potassium and the product is k3fecn6.

To find the theoretical yield, we need to use the formula:

Theoretical Yield = Reactant Mass x Stoichiometric Coefficient / Product Mass

where the stoichiometric coefficient is 6 for potassium. Plugging in the values, we get:

Theoretical Yield = 35.5 x 6 / 207.2

Theoretical Yield = 12.56 g

### Percent by mass of potassium

The percent by mass of potassium in k3fecn6 is 40.0%.

## Conclusion

The average percent by mass of potassium in k3fecn6 is 3.5.