moles NaOH = 5.20 g * 1 mol / 40.00 g = 0.13 mol
[NaOH] = n/V = 0.13 mol / 0.500L
= 0.26 M
The answer to this question is 0.26 M
The energy of one photon of this light is <span>4.85×<span>10<span>−19</span></span><span>J
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This is because copper is a transition metals.
Transition metals don't have a definite charge, you can see this on the periodic table. However, Alkali Earth, Alkali, Metalloids, Non-metals, Halogens, Noble Gases, etc, all have a specified charge.
Although, there are exceptions: Zinc, Gold, and Cadmium.
Aluminum is a poor metal, but it has it's own charge (3+).
Therefore, Copper has roman numerals due to the fact that it's a transition metal and Aluminum is a poor metal.
Hope this helps!
