Answer:
It's obviously true
Explanation:
As we have evolved over the years we have become more advanced
its c with the older down the older it is
Answer:
The concentration is ![C = 1.11 mol/L](https://tex.z-dn.net/?f=C%20%3D%201.11%20mol%2FL)
Explanation:
From the question we are told that
The absorbance is ![A = 0.347](https://tex.z-dn.net/?f=A%20%3D%200.347)
The length is ![l = 447 nm = 447 *10^{-7} \ cm](https://tex.z-dn.net/?f=l%20%3D%20%20447%20nm%20%20%3D%20%20447%20%2A10%5E%7B-7%7D%20%5C%20cm)
Generally absorbance is mathematically represented as
![A = \epsilon* C * l](https://tex.z-dn.net/?f=A%20%3D%20%20%5Cepsilon%2A%20%20C%20%2A%20l)
where
is the molar absorptivity of FeSCN2 with a value ![\epsilon = 7.0*10^3 L/cm/mol](https://tex.z-dn.net/?f=%5Cepsilon%20%20%3D%20%207.0%2A10%5E3%20L%2Fcm%2Fmol)
and
is the equilibrium concentration of FeSCN2
So
![C = \frac{A}{\epsilon * l }](https://tex.z-dn.net/?f=C%20%3D%20%5Cfrac%7BA%7D%7B%5Cepsilon%20%2A%20%20l%20%20%7D)
substituting values
![C = \frac{0.347}{7.0*10^{3} * 447 *10^{-7} }](https://tex.z-dn.net/?f=C%20%3D%20%5Cfrac%7B0.347%7D%7B7.0%2A10%5E%7B3%7D%20%2A%20%20447%20%2A10%5E%7B-7%7D%20%20%7D)
![C = 1.11 mol/L](https://tex.z-dn.net/?f=C%20%3D%201.11%20mol%2FL)
The answer is true. I know this because it almost happened to me.
The correct Answer for this question is D