A hydrogen atom has a radius of 2.5 x 10^11m
2 answers:
Answer:
The radius of a Magnesium atom is
Explanation:
The question is wrong and a graph is missing.
It should be '' A hydrogen atom has a radius of ''
I also add the missing graph.
If we take a look at the graph, we can see that using that scale the atomic radius of the Hydrogen is and the atomic radius of Magnesium is
Therefore, the radius of the Magnesium atom
is six times bigger than the Hydrogen atom
If we multiply by 6 the radius of the Hydrogen atom ⇒
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Answer:
The molar concentration of Cu²⁺ in the initial solution is 6.964x10⁻⁴ M.
Explanation:
The first step to solving this problem is calculating the number of moles of Cu(NO₃)₂ added to the solution:
n = 1.375x10⁻⁵ mol
The second step is relating the number of moles to the signal. We know the the n calculated before is equivalent to a signal increase of 19.9 units (45.1-25.2):
1.375x10⁻⁵ mol _________ 19.9 units
x _________ 25.2 units
x = 1.741x10⁻⁵mol
Finally, we can calculate the Cu²⁺ concentration :
C = 1.741x10⁻⁵mol / 0.025 L
C = 6.964x10⁻⁴ M