PLZ help me with chemistry problem? best answer 10 points!
Favorites|Homepage
Subscriptions | sitemap
HOME > > PLZ help me with chemistry problem? best answer 10 points!

PLZ help me with chemistry problem? best answer 10 points!

[From: ] [author: ] [Date: 12-05-23] [Hit: ]
86 = 0.the freezing point will be - 0.......
If a protein sample has a molar mass of approximately 14,000 u, what is the expected freezing point depression when 1.00g is dissolved in 50.0mL of distilled water?"

-
delta t = m X Kf

for water Kf = 1.86

m = moles of solute per kg of solvent

moles of protein = 1g/ 14000 g / mole = 7.142 x 10^-05 moles

which are in in .050 kg of water if we assume the density of water = 1 g/ ml

moles in 1 Kg = 7.142 x 10^-0 5 moles x 1.00 L / .050 L = 0.001428571

delta t = 0.001428571 x 1.86 = 0.0027 degrees C

the freezing point will be - 0.0027oC
1
keywords: with,answer,best,problem,chemistry,points,me,10,help,PLZ,PLZ help me with chemistry problem? best answer 10 points!
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .