Answer: 
concentration of 
= 0.50 M
concentration of 
= 0.25 M
Explanation:
The dissociation equation of 
is:
According to stoichiometry:
1 mole of gives 2 moles of
Thus 0.25 moles of gives =
moles of
Similarly,
1 mole of gives = 1 mole of
Thus 0.25 moles of gives =
moles of
Thus the concentration of and are 0.50 M and 0.25 M respectively.
Answer : The correct match is:
1 positive charge = 1 negative charge
2 positive charges = 2 negative charges
3 positive charges = 3 negative charges
Explanation :
As we now that there are three subatomic particles which are protons, electrons and neutrons.
The protons and neutrons are located inside the nucleus and electrons are located around the nucleus.
The protons are positively charged, the electrons are negatively charged and neutrons are neutral.
As we know that all the things are made up of charges and opposite charges attract to each other.
In a neutral atom, the positive charges and negative charges are balanced in an object. That means, in neutral atom the number of positive charges are equal to the negative charges.
So we can say that:
1 positive charge = 1 negative charge
2 positive charges = 2 negative charges
3 positive charges = 3 negative charges
