Answer:
2.94
Explanation:
There is some info missing. I think this is the original question.
<em>A solution is prepared at 25 °C that is initially 0.38 M in chloroacetic acid (HCH₂ClCO₂), a weak acid with Ka= 1.3 x 10⁻³, and 0.44 M in sodium chloroacetate (NaCH₂CICO₂). Calculate the pH of the solution. Round your answer to 2 decimal places.</em>
<em />
We have a buffer system formed by a weak acid (HCH₂ClCO₂) and its conjugate base (CH₂CICO₂⁻ coming from NaCH₂CICO₂). We can calculate the pH using the Henderson-Hasselbalch equation.
pH = pKa + log [CH₂CICO₂⁻]/[HCH₂ClCO₂]
pH = -log 1.3 x 10⁻³ + log (0.44 M/0.38 M)
pH = 2.94
The PH level of the surface of the water is 9.0
Hope this helps
Answer:
Work for the gas compression is 93 J.
Explanation:
The change in internal internal energy during the whole cycle will be 0 as internal energy is a state function.
According to first law of thermodynamics, 
where, 
represents change in internal energy, q is the heat exchanged and w is work done.
Here, 
( q is positive for addition of heat and w is negative for work don by system)
(q is negative for removal of heat)
or, w = 93 J
<span>A </span>calorie<span> is a unit that is used to measure </span>energy<span>. The </span>Calorie<span> you see on a food package is actually a kilocalorie, or 1,000 </span>calories<span>. A </span>Calorie<span> (kcal) is the amount of </span>energy<span> needed to raise the temperature of 1 kilogram of water 1 degree Celsius</span>
