1) What is the state of silver at room temperature , use the diagram in the image to explain why?2)What temperature is silver…..
a) as a liquid
b) as a gas

Answer:

Explanation:

Van der Waals forces are weak attractions that hold electrically neutral molecules together. At some point these molecules have an induced dipole, that is, the molecule acquires a partially positive and a partially negative charge momentarily, causing them to attract each other. They are Van de Waals forces: Dipolo - Dipolo forces, London forces, Ion forces - Dipolo

• Dipole-dipole forces: they are attractive forces between polar molecules (polar molecules occur when two atoms have different electronegativity, then the one with the greatest electronegativity will attract electrons towards each other, giving rise to two opposite charges on the bond. That is, this generates that in a polar molecule there is separation between positive and negative charges)

• London Dispersion Forces: occurs between non-polar molecules (union between atoms of the same element or between atoms with very little electronegativity difference) due to the movement of electrons. At some point there are more electrons to one side, which, being close to another atom or molecule, the electrons of the second are repelled, originating two instantaneous dipoles, which give rise to a force of attraction.
• Ion-dipole forces: they are attractive forces between an ion (an atom that has lost or gained an electron, then it has a charge) and a polar molecule.

They are weak, short-range electrostatic attractive forces between uncharged molecules, arising from the interaction of permanent or transient electric dipole moments.

Answer:

Xe = 0.431 mole

Kr = 0.569 mole

Explanation:

We are asked to calculate the mole fraction of each gas

Let's start from, what is mole fraction?

Mole fraction is the ratio of the number of moles of a substance to the total number of moles of all substance present in the mixture

In this question, we are provided with

Xe - 43.6g

Let's find the number of mole

n = m/Mm

n - number of mole

m - number of mass in grams

Mm - number of molar mass

The molar mass of Xe according to the periodic table is 131.293u

m - is given to be 43.6g

n = 43.6g / 131.293g/mol

n = 0.332mole

Secondly,

Kr - 36.8g

The molar mass of Kr is 83.798

m = 36.8

Using the same formula we used above to find mole

n = 36.8g / 83.798g/mol

n = 0.439mole

Let's calculate the total number of mole in the mixture

Total number of mole = 0.332 + 0.439

= 0.771 mole

To find each mole of each gas in the mixture, using this formula

Mole fraction of a gas = mole of gas A / total mole of the mixture

In Xe = 0.332 / 0.771

= 0.431 mole of Xe in the mixture of the gas

For Kr = 0.439 / 0.771

= 0.569 mole of Kr in the total mixture