Which of these compounds is ionic? A. KF B. CO C. CO2 D. SO2
2 answers:
Remember, ionic is when you have a metal with a nonmetal. covalent is two nonmetal together. most periodic table show that "staircase" on the right side that show where metals and nonmetal are; in any case, I attached a periodic table showing this.
a. KF--> K is metal, F is nonmental, so this is ionic
the rest of the choices are two nonmetals together.
a. KF--> K is metal, F is nonmental, so this is ionic
the rest of the choices are two nonmetals together.
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Answer:
Molar absorptivity or molar extinction co-effecient = 2120.14 cm⁻¹M⁻¹
Explanation:
First convert Concentration from ppm inM or mol/l
⇒ Molar mass of KMnO₄ = 158.03 g
⇒ 4.48 ppm = 4.48 mg/l = 4.48 x 10⁻³ g/l
⇒ Molarity = = 2.83 x 10⁻⁵ molar
Absorbance (A) = - log(T) ( T = % transmittance)
= - log(0.859)
= 0.06
According to Lambert Beer's law
ε =
or, ε =
or, ε = 2120.14 cm⁻¹M⁻¹
Where
ε = Molar absorptivity
A = absorbance
C = Molar concentration of KMnO₄ solution
l = length