<span>amount of heat and energy(energy of fusion)</span>
The substance that is a diatomic molecule is B. O2 Oxygen.
If there are no chemical controls which can be implemented at your worksite than one should wear recommended PPE for protection .
- PPE means personal protective equipment .
- PPE at the worksite is selected to reduce the risk to health and safety .
- PPE includes aprons , overalls , gloves , footwear face shields , chemical resistant glasses , and respirators .
- The PPE and administrative control measures depends upon the behavior and supervision of human .
- The efficacy of PPE depends entirely on the workers following the procedures and instructions appropriately .
To learn more about chemical controls please click here ,
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Answer:
56.9 mmoles of acetate are required in this buffer
Explanation:
To solve this, we can think in the Henderson Hasselbach equation:
pH = pKa + log ([CH₃COO⁻] / [CH₃COOH])
To make the buffer we know:
CH₃COOH + H₂O ⇄ CH₃COO⁻ + H₃O⁺ Ka
We know that Ka from acetic acid is: 1.8×10⁻⁵
pKa = - log Ka
pKa = 4.74
We replace data:
5.5 = 4.74 + log ([acetate] / 10 mmol)
5.5 - 4.74 = log ([acetate] / 10 mmol)
0.755 = log ([acetate] / 10 mmol)
10⁰'⁷⁵⁵ = ([acetate] / 10 mmol)
5.69 = ([acetate] / 10 mmol)
5.69 . 10 = [acetate] → 56.9 mmoles
