Question

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 1

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 $KMnO_4$

1 mole of $KMnO_4$ 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 $CO_2$

1 mole of $CO_2$ 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: $2.45\times 10^{-2}$ moles $CuSO_4.5H_2O$

1 mole of $CuSO_4.5H_2O$ 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 = $(2.45\times 10^{-2}\times 9)=0.2205moles$