Answer:
HC₂H₃O₂/KC₂H₃O₂
Explanation:
Considering the Henderson- Hasselbalch equation for the calculation of the pH of the basic buffer solution as:
![ pH=pK_b+log\frac{[salt]}{[acid]} ](https://tex.z-dn.net/?f=%0ApH%3DpK_b%2Blog%5Cfrac%7B%5Bsalt%5D%7D%7B%5Bacid%5D%7D%0A)
For a best pair, the pKa value must be equal to pH.
NH₃/NH₄Cl forms a basic buffer and cannot account for pH = 5
out of the acidic buffer given,
So, HF , Ka = 3.5 × 10⁻⁴ , So pKa = 3.46
HC₂H₃O₂ , Ka = 1.8 × 10⁻⁵ , So pKa = 4.77
<u>The best pair to show pH = 5 is HC₂H₃O₂/KC₂H₃O₂</u>
Answer:
11.9 g S
General Formulas and Concepts:
<u>Chem</u>
- Reading a Periodic Table
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
- Dimensional Analysis
Explanation:
<u>Step 1: Define</u>
2.23 × 10²³ atoms S
<u>Step 2: Define conversions</u>
Avogadro's Number
Molar Mass of S - 32.07 g/mol
<u>Step 3: Dimensional Analysis</u>
<u />
= 11.8758 g S
<u>Step 4: Check</u>
<em>We are given 3 sig figs. Follow sig fig rules.</em>
11.8758 g S ≈ 11.9 g S
C3H8 would be the answer but they would be to the power of the lettery thing I just cannot type it that way
Formation. Wave shoaling is the process when surface waves move towards shallow water, such as a beach, they slow down, their wave height increases and the distance between waves decreases. This behavior is called shoaling, and the waves are said to shoal.
Heavy rain fall causes shoals to form and change shape creating depressions and bars in the sand
Answer:
hahah animals in the world
