Answer:
Explanation:
HCl is strong acid, hence 0.04M of acid
= 0.057 M of H+
pH = -log [H+]
= -log [0.057]
= 1.244
Let the dissociation of trichloroacetic acid be:
HClO4 --> H^+ + ClO4^-
HA --> H+ + A-
0.072 - x x x
[H+] = 0.057 M
[HA] = 0.072 - 0.057
= 0.015 M
[H+] = [A-] = 0.057
Ka = [H+][A-]/[HA]
= (0.057^2)/(0.015)
= 0.217
= 0.22.
Answer:
I'm pretty sure it's neutrons the first one
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Below are the choices that can be found from other sources.
The answer is C endothermic and exothermic
<span>a. exothermic and exothermic
b. exothermic and endothermic
c. endothermic and exothermic
d. endothermic and endothermic</span>
Answer- The correct answer is ammonia.
Explanation- All other compounds that are formed do not have any essence of Nitrogen in it. Whereas, Methane is a compound with carbon and hydrogen as elements while water has hydrogen and oxygen as its elements.
Lastly Hydrogen and chlorine combined together to form hydrochloric acid. Hence the only compound left with nitrogen is ammonia and has nitrogen and hydrogen as its basic elements.
