100 centimeters thick
Starting thickness was 50 cm
1 cm every 50 years= 1x50
1x50=50
Old thickness + New thickness= 50 + 50 = 100 cm
:)
<span>3Mg(NO3)2 + 2K3PO4 ---> Mg3(PO4)2 + 6KNO3
n(</span>K3PO4):n(KNO3)=2:6=1:3
n(K3PO4):n(KNO3)=1:3
Answer:
Because the optimal range of buffering for a formic acid potassium formate buffer is 2.74 ≤ pH ≤ 4.74.
Explanation:
Every buffer solution has an optimal effective range due to pH = pKa ± 1. Outside this range, there is not enough acid molecules or conjugate base molecules to sustain the pH without variation. There is a certain amount of both molecules that has to be in the solution to maintain a pH controlled.
Being for the formic acid the pKa 3.74, the optimal effective range is between 2.74 and 4.74. Upper or lower these range a formic acid/potassium formate buffer does not work.
4 Tin is malleable and matrimonial lead in electricity.
