What is the total number of atoms in 1.0 mole of
1 answer:
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<u>Answer:</u> The mass of gallium produced by the electrolysis is 0.0354 grams.
<u>Explanation:</u>
The equation for the deposition of Ga(s) from Ga(III) solution follows:
- To calculate the total charge, we use the equation:
where,
C = charge
I = current = 0.490 A
t = time required (in seconds) = (Conversion factor: 1 min = 60 s)
Putting values in above equation, we get:
- To calculate the moles of electrons, we use the equation:
where,
C = charge = 147 C
F = Faradays constant = 96500
- Now, to calculate the moles of gallium, we use the equation:
where,
n = number of electrons transferred = 3
Putting values in above equation, we get:
- To calculate the mass of gallium, we use the equation:
Moles of Gallium =
Molar mass of Gallium = 69.72 g/mol
Putting values in above equation, we get:
Hence, the mass of gallium produced by the electrolysis is 0.0354 grams.
The given question is incomplete. the complete question is : If 5.15 g is dissolved in enough water to make exactly 323 ml of solution, what is the molar concentartion of nitrate ion.
Answer: The molar concentartion of nitrate ion is 0.195.
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
Given : 5.15 g of is dissolved
Volume of solution = 323 ml
where,
n= moles of solute
= volume of solution = 323 ml
As 1 M of gives 3 M of
ions.
Thus 0.065 M of gives =
of
ions.
The molar concentartion of nitrate ion is 0.195.