The answer is 5.7600 because the 7 is telling the 5 to go up
Answer:
ray AC
Step-by-step explanation:
hope thsi helpes!
Answer:
pretty sure it's A
Step-by-step explanation:
cuz a common factor of 9 and 10 is 90 do the calculations and it should be simple.
Answer:
The area of the traiangle=Area of both traingle
=1/2×4.4×6.1 +1/2×4.4×3.3
=2.2×6.1+2.2×3.3
=2.2(6.1+3.3)
=2.2×9.4
=20.68in^2
Answer:
The correct option is d
Step-by-step explanation:
From the question we are told that
The concentration of HF is [HF] = 0.6 M
The concentration of NaF is ![[NaF ] = 0.2 M](https://tex.z-dn.net/?f=%5BNaF%20%5D%20%3D%20%200.2%20M)
The Ka of HF is
Generally HF(Hydrogen fluoride ) is ionized as follows
Generally NaF(Sodium fluoride ) is ionized as follows
Generally the from Henderson-Hasselbalch equation the pH of the buffer is mathematically represented as
![pH = pKa + log [\frac{[NaF ]}{HF} ]](https://tex.z-dn.net/?f=pH%20%20%3D%20%20pKa%20%20%2B%20log%20%5B%5Cfrac%7B%5BNaF%20%5D%7D%7BHF%7D%20%5D)
=> ![pH = -log(K_a) + log [\frac{[NaF ]}{HF} ]](https://tex.z-dn.net/?f=pH%20%20%3D%20%20-log%28K_a%29%20%20%2B%20log%20%5B%5Cfrac%7B%5BNaF%20%5D%7D%7BHF%7D%20%5D)
=> ![pH = -log(6.8 *10^{-4}) + log [\frac{[0.2 ]}{0.6} ]](https://tex.z-dn.net/?f=pH%20%20%3D%20%20-log%286.8%20%2A10%5E%7B-4%7D%29%20%20%2B%20log%20%5B%5Cfrac%7B%5B0.2%20%5D%7D%7B0.6%7D%20%5D)
=> ![pH = 2.69](https://tex.z-dn.net/?f=pH%20%20%3D%20%202.69)