(i) Volume of point Naon to reach equivalence. = 24.0mL
(ii) volume of Naon used to reach 50% T = 12.0mL
(iii) PKA of an unknown acid = 4.8
(iv) moles of acid reacted = moles of NaOH
man/molar mass = 0.269g/MW = Molarity x volume
0.269g/MW = 0.09560 mol/K x 24. 0×/K
MW = 0.269g/0.09560 mol x 24.0x
MW = 117.24g mol-1
(v) In matching the given table of molar masses. with obtained man matches with that, we get that it of hexanoic acid.
<u>unknown acid = hexanoic acid</u>
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Titration is used to determine the amount of a substance present by reacting it with a known amount of another substance. For example, the molar mass of an acid can be found by titrating it with a base solution of known concentration. Your unknown solid is an acid. This is dissolved in water and phenolphthalein indicator is added and titrated to the endpoint with standard NaOH solution. Unknown acids are monobasic. There is only one acidic hydrogen per molecule.
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Answer:Pressure of NH3 increases at the rate of 160torr/hr
Explanation:
According to the equation below
N2H4 (g) + H2 (g) ==> 2 NH3 (g)
It shows that 1mol of N2H4 will gives 2mol of NH3
Therefore, if the partial pressure rate of N2H4 is 80torr/hr, the partial pressure of NH3 increases by 2×80=160torr/hr
The cryosphere is those portions of Earth's surface where water is in solid form, including sea ice, lake ice, river ice, snow cover, glaciers, ice caps, ice sheets, and frozen ground.
Answer:
Byzantine war and world war II
Explanation: