1. what kind of intermolecular forces act between a chlorine monofluoride molecule and a hydrogen bromide molecule
note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.

Dipole- Dipole force.

Explanation:

Here both Chlorine monofloride( ClF) and hydrogen bromide( HBr) both are highly polar molecules. Polar molecules have dipole intermolecular forces. Polar molecules are adhering to their neighbors atom and tend to have higher boiling points, than non-polar molecules. One polar molecule's positive end is drawn by another polar molecule's negative end and vice versa.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

c) should be the answer.