If a 22. 5 mm copper (ii) solution(solution a) had an absorbance of 1. 65. Then, the absorbance if 8 ml of solution a was used to prepare a 20. 0 ml of a new copper (ii) solution is 918.84.
According to Beer-Lambert law, the absorbance (A) of a substance depends on its concentration (c)
A = ε . l. c
where,
ε: absorptivity of the species
l: optical path length
A 22.5 mM phosphate solution (solution A) had an absorbance of 1.012.
A = ε . l . c
1.65 = ε . l . 22.5 mM
ε . l = 37.125 mM⁻¹
We will calculate the concentration of the second solution using the dilution rule.
C₁ . V₁ = C₂ . V₂
22.5mM . 8 mL = C₂ . 20.0 mL
C₂ = 24.75 mM
The absorbance of the second solution is:
A = (ε . l ). c
A = (37.125 mM⁻¹) x 24.75 mM = 918.84
Thus, we find that the value of absorbance is 918.84.
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Answer: 2
Explanation: 2Li + 2H2O → 2LiOH + H2
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Answer:
C. Destructive interference
Explanation:
<em>Destructive interference</em> is when there are two waves <u>with the same frequency</u>, and the peaks of one wave (the highest points) line up with the valleys (the lowest points) of the second one.
Constructive interference would cause the sound to be louder.
Absorption and reflection are interactions that would not take into account the fact that the headphones produce sounds.
