What is the number of electrons in the outermost energy level of an oxygen atom?
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There are 1.2 hr would this current have to be applied to plate out 7. 20 g of iron .
Calculation ,
Given ; Current ( I ) = 5. 68 A
In , the valancy of Fe is +2 .
2 moles of are required for the decomposition of 1 mole of Fe .
7. 20 g of Fe in moles = 7. 20 g /55.845 g/mol =0.12 mole
x moles of are required for the decomposition of 0.128 mole of Fe .
moles of are required = 0.256 moles
Charge on 1 mole of = 96500 C
Charge on 0.256 mole of = 24704 C
Current ( I )= Q/t
t =Q / I = 24704 C/5. 68 A = 4349 sec = 1.2 hr
Therefore , there are 1.2 hr would this current have to be applied to plate out 7. 20 g of iron .
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Explanation:
The given data is as follows.
= ?,
= 0.85 M
= 185 mL,
= 35.7 mL
where, is concentration of acid
is the volume of acid
is the concentration of base
is the volume of base
According to the neutralization formula.
=
Now, substituting the given values into the above formula as follows.
=
=
= 0.164 M
Thus, we can conclude that concentration of acid is 0.164 M.