A) 5.2 x 10^2
B) 86.
C) 6.4 x 10^3
D) 5.0
E) 22.
F) 0.89
Answer:
After measuring the solute, Carl should first dissolve the solid in a small amount of DI water before diluting to the total volume.
Explanation:
To ensure that all the solute dissolves in the solution, first dissolve the solid in less than the total volume of solution needed.
You multiply avogadro's number to what you were given.
8.30x10^23 * 6. 0221409x10^23
=1.357*10^25
That should be the right answer but I'm not sure. It has been awhile since I have done this.
Answer:
1.65 A
Explanation:
The hydrogen gas dissociates following the equation:
H₂(g) → 2H⁺ + 2e⁻
So, for 1 mol of H₂, 2 moles of electrons are given. The current is formed because of the presence of the electrons. Thus, the number of moles of electrons is the double of the moles of hydrogen gas: 1.026x10⁻³ mol.
By the Faraday law, 1 mol of electrons produces 96500 C of charge, thus:
1 mol --------------- 96500 C
1.026x10⁻³ mol ---- x
By a simple direct three rule:
x = 99.009 C
The current is the charge divided by the time. So, for 1 min = 60 s,
i = 99.009/60
i = 1.65 A
