Answer:
3
Explanation:
Answer : The pH of a solution is, 9.903
Explanation : Given,
Concentration of hydrogen ion =
pH : It is defined as the negative logarithm of hydrogen ion concentration.
Formula used :
Now put the value of hydrogen ion concentration in this formula, we get the pH of a solution.
Therefore, the pH of a solution is, 9.903
Answer:
Explanation:
The atomic number of zinc is 30, which means that the neutral atom has equal numbers of protons and electrons, so a neutral atom of zinc would have 30 electrons.
The electron configuration of a neutral zinc atom is 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
4s
2
.
The Zn
2+
ion has lost two electrons, which leaves it with 30 protons and 28 electrons.
The electron configuration of Zn
2+
is 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
.
Explanation:We have momemtum = mass X velocity
p = mv
OR, p/m = v
v = (125kg m/s)25kg
v = 125/25 m/s
v = 5 m/s