Answer:

Explanation:
Hello,
In this case, the undergoing chemical reaction is:

In such a way, considering the 3 to 1 molar relationship between ammonia and ammonium phosphate, the moles of ammonia result:

Best regards.
1st find the pOH = 14 - 4.75 = 9.25
then do 10^-9.25 = 5.62x10^-10 OH- concentration
name= calcium
atomic mass= 40.078 atomic mass unit
no of protons= 20
no of electrons=20