The answer is B.
Step By Step Explanation:
<span>350 nanometers
We first need to calculate how much energy is needed to ionize a single atom. So divide the kilojoules/mol energy value by avogadro's number.
342 kj/mol / 6.0221409x10^23 = 5.67904x10^-19 Joules
So we need a photon with 5.67904x10^-19 Joules of energy. The equation to express the energy of a photon is
E = hc/w
where
h = Planck constant (6.626070040Ă—10â’34 Js)
c = speed of light (299792458 m/s)
w = wavelength of photon
Solving for w
E = hc/w
Ew = hc
w = hc/E
Substituting known values
w = 6.626070040Ă—10^â’34 Js * 299792458 m/s / 5.67904x10^-19 J
w = 1.9864458x10^-25 Jm / 5.67904x10^-19 J
w = 3.497855x10^-7 m
w = 3.50x10^-7 m
w = 350 nm</span>
The effect would a decrease in pH have on the amount of potassium ion in the urine will be a decrease in the amount of potassium in the urine. There will be a decrease in the amount of potassium in the urine, it is the effect if there would be a decrease in pH on the amount of the potassium ion in the urine.
1,234,500 mg is equivalent to 1.234 kilograms in four significant figures.
<h3>How to convert mg to kg?</h3>
Milligrams and kilograms are both units of mass that represents 1 × 10-³grams and 1 × 10³grams respectively.
However, they are both inter-convertible and can be converted as follows:
1 milligram = 1 × 10-⁶ kilogram
This means that 1,234,500 mg = 1,234,500 × 10-⁶ kg
= 1.234 kilograms
Therefore, 1,234,500 mg is equivalent to 1.234 kilograms in four significant figures.
Learn more about milligrams at: brainly.com/question/20320382
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