Answer:
Valence electrons are the most important electrons to an atom.
Explanation:
They will determine many of the atoms traits since they are involved in bonding with other atoms.
Answer: sum of the pressure of the two gases present.
Explanation:
According to Dalton's law, the total pressure of a mixture of gases is the sum of individual pressures exerted by the constituent gases.
For example if there are there are two gases hydrogen and oxygen with individual pressure of 30 and 20 atm each. Then the total pressure in the container will be:
Thus

Thus if two gases are present in a container, the total pressure in the container is equal to sum of the pressure of the two gases present.
Monkey is good and that is all their it to it
Answer:
Hence the<u> ions per mole</u> are:


In one mole of Li2SO3 , the number of the atoms are

Explanation:
The formula of lithium sulfite is Li2SO3.

It contain Li+ and SO3(2-) ions.This can be represented by :

Hence one mole of Li2SO3 will give 2 Li+ ions and 1 SO3 (2-) ion.
Hence the<u> ions per mole</u> are:


Number of atoms in lithium sulfite depends upon the<u> mass of the Li2SO3 present</u> .
Li2SO3 = 93.94 g/mole
This mass is equal to 1 mole of Li2SO3
Now<u> 1 mole</u> of any substance contain Na atoms . This is known as Avogadro Number.

Hence , if 1 mole of Li2SO3 is present then it contains Na atoms
If other then 1 mole present then number of atoms are calculated by:

Here n = number of moles
if the mass of the compound is given then first calculate the number of moles.