0.80 mol MgBr2 is added to 1.00 kg water. Determine the freezing point of the solution. Water has a freezing point depression constant of 1.86°C•kg/mol. Which equation should you use?

b is the correct

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

the answer is a for sure mark brainliest i had got this right on usatestprep