Answer:
The concentration of is
The number of ion is
Explanation:
Generally the solubility product constant of HgS(s) is
This solubility product constant is mathematically represented as
Since the HgS is saturated it implies that the concentration of sulfur ion is the same as that of mercury ion s
=>
=>
substituting values
=>
From above mole of is equal to 1 L
Then x mole of will be equal to 1000 L
Therefore
=>
Now the number of ions are in 1000 L of the solution is mathematically represented as
Where is the avogadro's constant which has a value of
Substituting value
I would help if i could im sorry im sure someone else will answer soon im honestly trying to help as many people as i can
Answer:
A piece of paper
Explanation:
The emitted radiations are helium nuclei which is also called alpha particle. The alpha radiations can be stopped by a piece of paper. While beta radiations can be blocked by the sheet of aluminium and Lead is used for the protection against gamma radiations because of its high molecular density.
Alpha radiations:
Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number 4 less than and atomic number 2 less than the starting atom.
Alpha radiations can travel in a short distance.
These radiations can not penetrate into the skin or clothes.
These radiations can be harmful for the human if these are inhaled.
These radiations can be stopped by a piece of paper.
B lymphocytes
Lymphocytes are one of the main types of immune cells. Lymphocytes are divided mainly into B and T cells. B lymphocytes produce antibodies - proteins (gamma globulins) that recognize foreign substances (antigen) and attach themselves to them. B lymphocytes (or B cells) are each programmed to make one specific antibody.