Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. 1.25g of a compound when dissolved in 15mls of benzene lowers the freezing point of benzene from -6 degrees celsuis to -8.5 degrees celsuis. The Kfp of benzene is -3.5kg/mol degree celsuis. calculate the molar mass of the compound.
a. When 3.5g of salt is dissolved in 50mls of water the freezing point of water is lowered to -1.5 degree celsuis. the Kfp of water is -1.81kg.mole/ degree celsuis. calculate the molar mass of the compound.
b. What would be the number of ions present in a solution of an electrolyte if the freezing point is lowered to -5.1 degree celsuis. given that a non-electrolyte of the same concentration as the electrolyte lowers the freezing point of the same to a temperature of 1.7 degree celsuis.
c. caluculate the molality of a solution if 2.5 grams of sucrose C12H22O11 is dissolved in 25 mls of water. atomic masses in g/mol: C=12.01, H=1.008, O=16.0 density of water = 0.99g/ml
d .calculate the mole fraction of the solute in problem 4.
e. if the boiling point of benzene is 80 C, and the boling point of a solution containing 0.25g of mls of benzene is 81
if the freezing point of a .106 m CH3COOH solution is -.348 degrees Celsius, calculate the percent of the acid that has undergone ionization?
The graph above shows the heating curve of wate
A student carried out the synthesis of aspirin starting with 3.48g of salicylic acid. After carrying out the reaction, recrystallizing and then drying the product, the student obtained 3.30g of aspirin. Calculate the student's percent yield.
The photochemical reaction of 2,4-dimethylpentane with molecular chlorine affords a mixture of monochlorinated alkyl halides. Draw teh structures of these products and predict the molar ratio when the reaction is run at 25C
What is the percent purity of the calcium hydroxide if the titration requires 21.42 mL of the acid to reach the endpoint
Calculate the pressure and the temperature of the compressed gas. In a diesel engine the compression ratios are typically much higher; redo the same calculation for the compression ratio of 20:1.
Calculate the mass of I2 produced at the anode if a current of 2.85 A is passed through a solution of KI for 56 minutes.
Calculate the detection limit (90% and 95% confidence interval) for a single measurement. Use the equation D.L = (ks)/m
For a hypothetical gas-phase reaction that is second order in A and third order in B, by what factor does the rate change if pA is decreased by 4 times and pB is doubled
Rank these elements according to first ionization energy (highest to lowest) : Ne, F, O, N, C, B, Be, Li. HINT: There is a general trend for ionization energy within a period of the periodic table
a buffer solution is prepred by adding 15.00g of sodium acetate (NaC2H3O2) and 12.50g of acetic acid to enough water to make 500mL (three significant figures) of solution.
Arrange these compounds in order of increasing boiling point and explain your reasoning. (assume similar mass) CH3OCH3 CH3CH2CH3 CH3CH2OH 2. Which of the following compounds would have the greater viscosity?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd