An analytical chemist is titrating 209.1 ml of a 0.5900 M solution of hydrazoic acid with a 0.8200 M solution of NaOH The pka of hydrazoic acid is 4.72 Calculate the pH of the acid solution after the chemist has added 166.6 ml of the NaOH solution

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

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percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally