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!
Problem- When 2.05 g of polystyrene was dissolved in toluene to give 100 mL of solution, the osmotic pressure of the solution was 0.605 kPa at 25oC. The molar mass of the polymer is: Select one:
a. 7.8 x 104 g/mol
b. 2.1 x 104 g/mol
c. 3.6 x 104 g/mol
d. 4.2 x 104 g/mol
e. 8.4 x 104 g/mol
Determine the solution for the above problem express your work in detail
What is the amount of ammonia (as nitrogen) needed to sustain 1 gram/L of cells in an engineered bioreactor b. What is the amount of phosphorus needed to sustain the same concentration of cells in the reactor?
A reaction has a standard free energy change of -12.8 kJ mol^-1 (-3.059 kcal mol^-1). Calculate the equilibrium constant for the reaction at 25 degrees celcius.
Since the sample is an unknown solid, I will have to make a solution without knowing exactly what to mix. In your expertise, how much of the solid do you expect to dissolve in what volume of water and what is your reasons for choosing these amount..
Explain how would you make 100ml of a carbonic acid buffer at 0.2M as well as ph =9.8 using 0.5M HCO3 and either 0.1M NaOH or 0.1M HCl and water
The He I (21.22 eV) photoelectron spectrum of a molecule shows a series of equally spaced sharp peaks corresponding to photoelectron kinetic energies of 10.259, 10.388, 10.517, 10.646, and 10.775 eV. What is the vibrational frequency of the molecu..
it takes 208.4 kj of energy to remove 1 mole of electrons an atom on the surface of rubidium metal. how much energy
What is the maximum number of electrons in an atom that can have the following set of quantum numbers?
When a certain unknown hydrocarbon is completely combusted with excess oxygen, it is observed that 1.12 L of H2O gas and 3.36 L of CO2 are produced at STP. What is the empirical formula of the unknown hydrocarbon
What is the pH of a solution which is 0.025M in weak base and 0.035 M in the conjugate weak acid (Ka=7.1 x 10^-6)c
What assumption did you make about the reaction of KMnO4 solution and H2C2O4 solution in those determinations that allowed you to consider k to be a constant
A person inhales air richer in O2 and exhales air richer in CO2 and water vapor. During each hour of sleep, a person exhales a total of 300. L of this CO2-enriched and H2O-enriched air.
The formaldehyde content of a pesticide preparation was determined by weighing .3124g of liquid sample into a flask containing 50ml of .0996M NaOH and 50mL of 3%H2O2. On heating, the following reaction took place
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