Assume that you take 0.46 mol of kbr and do some chemistry on it such that all of the potassium and bromine are separated. how many grams of potassium should you have?

We'll have 13.85 grams of potassium

Explanation:

Step 1: Data given

Moles KBr = 0.46 mol

Molar mass KBr = 119.00 g/mol

Molar mass K = 30.10 g/mol

Step 2: The balanced equation

2KBr ⇆ 2K + Br2

Step 3: Calculate moles of K

For 2 moles KBr consumed we'll have 2 moles K and 1 mol Br2

For 0.46 moles KBr we'll have 0.46 moles K

Step 4: Calculate mass of K

Mass K = moles K * molar mass K

Mass K = 0.46 moles * 30.10 g/mol

Mass K = 13.85 grams

We'll have 13.85 grams of potassium

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