Question

How many moles of oxygen atoms are in 2.79

Answer 1

0.05 mol of oxygen atom.

Explanation:

Mass of potassium hydroxide = 2.79g

Unknown:

Number of moles = ?

Solution:

To solve this problem, find the number of moles of the potassium hydroxide.

  Number of moles of KOH = $\frac{mass}{molar mass}$

 Molar mass of KOH = 39 + 16 + 1 = 56g/mol

 Number of moles of KOH = $\frac{2.79}{56}$ = 0.05mole

 Now,

      1 mole of KOH contains 1 mole of oxygen atom

      0.05 mole of KOH will have 0.05 mole of oxygen atom.

Learn more:

Number of moles brainly.com/question/1841136

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