A, i think, dont quote me on it tho
When 0.1 M HNO₃ is added to water it dissociates as follow,
HNO₃ → H₃O⁺ + NO₃⁻
Let us calculate the pH of this acid in order to know its strength,
As,
pH = -log [H₃O⁺]
Putting H⁺ concentration value,
pH = -log [0.1]
pH = 1
It is highly acidic,
And being strong acid it completely ionizes in water producing only H₃O⁺ and NO₃⁻.
So,
The concentration of H₃O⁺ = 0.1 M
and,
The concentration of NO₃⁻ = 0.1 M
Hydrogen (H) was first, followed by helium (He).
Alpha (α), beta (β-) and gamma (γ) decay. When the nucleus of an atom possesses either too many or too few neutrons compared to the number of protons it becomes unstable. These are called radioactive isotopes. Unstable nuclei split up in a process called radioactive decay and emit radioactive radiation.
Given :
The atomic number of Arsenic (As) is 33.
The average atomic mass is 74.92 amu.
To Find :
A neutral arsenic atom will have protons.
Solution :
We know, atomic mass is the sum of number of protons and neutrons.
Also, atomic number is the number of protons present in an atom.
Therefore, a neutral arsenic atom will have 33 protons.