The kind of thermochemical equation represented below
that is
CaO(s) + H2O (l) = Ca(OH)2 (s) +65.2 kj
is exothermic ( answer B)
This is because its heat energy has a + sign meaning that heat is released by the reaction above.
Answer:
Legislative branch, Executive branch, Judicial branch
Answer:
Explanation:
Hello,
In this case, considering the dissociation of thiamine hydrochloride:
It is convenient to write it as:
Or:
With which the Henderson-Hasselbalch equation is applied:
Therefore:
Thus, as the pH equals the concentration of hydrogen which also equals the concentration of the conjugate base, one obtains:
Now, solving for the concentration of acid ([HA]):
Finally, the mass turns out:
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Hydrogen sulfide is a <u>compound</u>
<h3>Explanation</h3>
A compound is a substance composed of two or more element in a fixed proportion and it can be separated into simpler substance and element only by chemical method. Hydrogen sulfide is a chemical compound with H2S formula.