Question

the vapour pressure of 2.1 % of an aqua solution of non volatile solute at 373 kelvin is 755 mm HG calculate the molar mass of solute ​

Answer 1

no the things are nothing more to make mobile phones than

Answer 2

P° A = 760 mmHg

(P° A-P A) / P° A = xB

= (760 - 755) / 760

= 0.0065789

m water = 100 - 2.1 = 97.9 g

n water = 97.9/18 = 5.4389 moles

xB = nB/(nA+nB)

0.0065789 = nB/(nB+5.4389)

nB = 0.036019

Molar mass = m/nB

= 2.1 / 0.036019

= 58.303 g.