B.element
Siri answered that question but hope it helps
The equilibrium equation showing the dissociation of weak acid is:
is the equilibrium constant for this equation, which is referred to as the acid dissociation constant. value will determine the acidic strength of the acids. Greater the value, more will be the acidity.
Calculating the value from given equilibrium concentrations:
=
=
Answer:
Data is not valid
Explanation:
When two liquids having different temperatures are mixed, regardless of the volumes, the final mix temperature will ALWAYS be between the initial temperature values.
1st Law Thermo => Law of Conservation of Energy => Energy can not be created nor destroyed, only changed in form. Mixing 22°C with 75°C will NOT result in a mix having a final temperature of 80°C.
∑ΔE = 0 => (mcΔT)₁ + (mcΔT)₂ = 0
[(20g)(1cal/g·°C)(Tₓ - 22°C)] + [(80g)(1cal/g·°C)(Tₓ - 75°C)] = 0
=> 20(Tₓ - 22) + 80(Tₓ - 75) = 0
=> 20Tₓ - 440 + 80Tₓ - 75 = 0
=> 100Tₓ = 440 + 75 = 515
=> Tₓ = (515/100)°C = 51.5°C final mix temperature
Ultraviolet–visible spectroscopy<span> or ultraviolet-visible spectrophotometry </span><span>refers to absorption </span>spectroscopy or reflectance spectroscopy<span> in the ultraviolet-visible spectral region. This means it uses light in the visible and adjacent (near-</span>UV<span> and near-infrared [NIR]) ranges.
I hope this helps!</span>