Question

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

(a) 2.41 mol KMnO4
(b) 46.8 mol CO2
(c) 1.10 10-2 mol CuSO4·5 H2O

Answer 1

How many moles of oxygen atoms are contained in the following?(a) 2.41 mol KMnO4

2.41 mol KMnO4 ( 4 mol O / 1 mol KMnO4 ) ( 6.022 x 10^23 atoms / mol) = 5.81 x 10^24 atoms O


(b) 46.8 mol CO2

46.8 mol CO2 ( 2 mol O / 1 mol CO2) ( 6.022 x 10^23 atoms / mol) = 5.64 x 10^25 atoms O


(c) 1.10 x 10-2 mol CuSO4·5 H2O

1.10 x 10-2 mol CuSO4·5 H2O ( 5 mol O / 1 mol CuSO4·5 H2O ) ( 6.022 x 10^23 atoms / mol) = 3.31 x 10^22 atoms O