Acertain metal fluoride crystallizes in such a way that the fluoride ions occupy

Explanation:

In a simple cubic lattice lattice, the atoms are present at the eight corners of the cibe.

Since it is mentioned that the fluorine is present at the corners and also 1 corners are shared by 8 unit cells. So, share of atom in one unit cell is:-

Also, the metal, M occupy half of the body centre. A cube has only one body centre. So, share of M in each unit cell:-

Thus, the formula is:-

Or simplifying

Answer : The number of moles of gas present in container are 1.697 mole.

Explanation :

Using ideal gas equation,

where,

P = pressure of gas = 74 mmHg = 0.097 atm

conversion used : (1 atm = 760 mmHg)

V = volume of gas = 500.0 L

T = temperature of gas =

n = number of moles of gas = ?

R = gas constant = 0.0821 L.atm/mole.K

Now put all the given values in the ideal gas equation, we get the number of moles of gas in the container.

Therefore, the number of moles of gas present in container are 1.697 mole.