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How many moles of oxygen atoms are contained in the following?

A) 3.31 mil KMnO4
B)43.4 mol CO2
C)2.45e-2 mol CuSO4•5 H2O

Answer :

Answer:

For A: The moles of oxygen atoms are 13.24 moles

For B: The moles of oxygen atoms are 86.8 moles

For C: The moles of oxygen atoms are 0.2205 moles

Explanation:

  • For A: 3.31 moles [tex]KMnO_4[/tex]

1 mole of [tex]KMnO_4[/tex] contains 1 mole of potassium atoms, 1 mole of manganese atoms and 4 moles of oxygen atoms

So, moles of oxygen atoms = (3.31 × 4) = 13.24 moles

  • For B: 43.4 moles [tex]CO_2[/tex]

1 mole of [tex]CO_2[/tex] contains 1 mole of carbon atoms and 2 moles of oxygen atoms

So, moles of oxygen atoms = (43.4 × 2) = 86.8 moles

  • For C: [tex]2.45\times 10^{-2}[/tex] moles [tex]CuSO_4.5H_2O[/tex]

1 mole of [tex]CuSO_4.5H_2O[/tex] contains 1 mole of copper atoms, 1 mole of sulfur atoms, 10 moles of hydrogen atoms and 9 moles of oxygen atoms

So, moles of oxygen atoms = [tex](2.45\times 10^{-2}\times 9)=0.2205moles[/tex]

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