Answer:
E i is like Math so I think this will help you
The word Pseudoscience really means that it's just a collection of beliefs or practices that are mistake or regarded as being scientific fact. Astrology is a belief system, while on the other hand, its brother, Astronomy is a science. These two go hand in hand. It's a quite common mistake to mix up Astrology (star signs) and Astronomy (study of space) . In order for a hypothesis to be scientific, it has to satisfy a certain criteria: it has to be a testable thing. So therefore Astrology is a business, so it can be skeptical. There is hard to get any proof that Astrology is really a pseudoscience. Sorry if I was not much help.... Hope it helped anyway.
Answer:
(3) 5.36
Explanation:
Since this is a titration of a weak acid before reaching equivalence point, we will have effectively a buffer solution. Then we can use the Henderson-Hasselbalch equation to answer this question.
The reaction is:
HAc + NaOH ⇒ NaAc + H₂O
V NaOH = 40 mL x 1 L/1000 mL = 0.040 L
mol NaOH reacted with HAc = 0.040 L x 0.05 mol/L = 0.002 mol
mol HAC originally present = 0.050 L x 0.05 mol/L = 0.0025 mol
mol HAc left after reaction = 0.0025 - 0.002 = 0.0005
Now that we have calculated the quantities of the weak acid and its conjugate base in the buffer, we just plug the values into the equation
pH = pKa + log ((Ac⁻)/(HAc))
(Notice we do not have to calculate the molarities of Ac⁻ and HAc because the volumes cancel in the quotient)
pH = -log (1.75 x 10⁻⁵) + log (0.002/0.0005) = 5.36
THe answer is 5.36
Answer:
A
Explanation:
Acid chloride: --C=O-Cl. Stretch range ~1750-1820cm-1. I'd probably pick
(A) 1800 cm-1, as this value is in the middle (-ish) of that range.
Hence the correct answer is 1800 cm^-1
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