b)
1 molecule of Ba(NO3)2 contains 6 oxygen atoms. Thus 1 mole of Ba(NO3)2 molecule contains 6 moles of oxygen.
In case of 8.18g of Ba(NO3)2,
Number of moles of Ba(NO3)2 = (8.18g) / (261.337g/mol) = 3.13 x 10-2
( Since Number of moles = Given mass/ Molecular mass)
We know, 1 mole of Ba(NO3)2 contains 6 moles of oxygen, so, 3.13 x 10-2 moles of Ba(NO3)2 contains =
(3.13 x 10-2) x 6 = 0.1878 moles of oxygen.
c)
Part B not given.
d)
Number of moles of Ba(NO3)2 = (7.3g) / (261.337g/mol) = 2.793 x 10-2
( Since Number of moles = Given mass/ Molecular mass)
Number of molecules of Ba(NO3)2 = (2.793 x 10-2) x (6.022 x 1023) = 1.682 x 1022
(Since Number of molecules = Number of moles x Avogadro's number)
Number of Oxygen atom in Ba(NO3)2 = (1.682 x 1022) x 6 = 1.0092 x 1023
(Since Number of Oxygen atom = Number of molecules x 6(Atomicity of oxygen inBa(NO3)2 , ie, 1 molecule of Ba(NO3)2 contains 6 oxygen atoms)).
b. How many moles of oxygen are in 8.18 g of Ba(NO3)2? c. What is the...
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