Answer: The statement conjugate base of hydrofluoric acid is weaker than that of acetic acid is most likely true.
Explanation:
A strong acid upon dissociation gives a weak conjugate base. This can also be said as stronger is the acid, weaker will be its conjugate base or vice-versa.
Hydrofluoric acid is a strong base as it dissociates completely when dissolved in water.
For example, 
The conjugate base is 
which is a weak base.
Acetic acid is a weak acid as it dissociates partially when dissolved in water. So, the conjugate base of acetic acid is a strong base.
Thus, we can conclude that the statement conjugate base of hydrofluoric acid is weaker than that of acetic acid is most likely true.
Answer:
As long as it is a blank solution of the reagent, the Absorbance will be 0 regardless of the path length.
Explanation:
Absorbance of light by a reagent of concentration c, is given as
A = εcl
A = Absorbance
ε = molar absorptivity
c = concentration of reagent.
l = length of light path or length of the solution the light passes through.
So, if all.other factors are held constant, If a sample for spectrophotometric analysis is placed in a 10-cm cell, the absorbance will be 10 times greater than the absorbance in a 1-cm cell.
But the reagent blank solution is called a blank solution because it lacks the given reagent. A blank solution does not contain detectable amounts of the reagent under consideration. That is, the concentration of reagent in the blank solution is 0.
Hence, the Absorbance is subsequently 0. And increasing or decreasing the path length of light will not change anything. As long as it is a blank solution of the reagent, the Absorbance will be 0 regardless of the path length.
Hope this Helps!!!
Answer:
The mass of P₄O₁₀ (s) formed is 471.03 g
Explanation:
4PH₃(g) + 8O₂(g) → P₄O₁₀ (s) + 6H₂O (g)
This is the ballanced equation.
Every 4 moles of phosphine, 1 mol of tetraphosphorus decaoxide is generated.
Moles of PH₃ = Mass PH₃ / Molar mass PH₃
Moles PH₃ = 225 g / 33.9 g/m
Moles PH₃ = 6.63 moles
So the rule of three, will be:
If 4 moles of PH₃ generate 1 mol P₄O₁₀
Then, 6.63 moles of PH₃ generate (6.63 .1)/4 = 1.66 moles
If we want to know the mass:
Moles . Molar mass = mass
Molar mass P₄O₁₀ = 283.88 g/m
1.66m . 283.88 g/m = 471.03 g
