qwayedeyonela27 qwayedeyonela27 23-09-2021 Chemistry contestada Question 7 5 points The pH of the buffer obtained by adding 20.0 g of NH4CI (NH4Cl = 53.492 g mol '] to 500.0 mL of 0.400 M NH3, is: O A. 8.971 O B.9.178 O C. 4.958 O D.5.264.