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Calculate the ph of a buffer solution that is 0.10M in ammonia and 0.15M in ammonium chloride .kb for ammonia is 1.8*10^-5

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Use the Henderson-Hasselbalch equation.
pH = pKa + log [(base)/(acid)]
The base will be NH3. The acid is NH4Cl.

What is the molar mass of a compound if 0.27 mol has a mass of 37.3 g

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