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Question- A polymer is disperesed in a solution of MEK and contains about 40% solids by weight. You've been asked to fully crosslink a polymer whose average molecular weight is 42000g/mol. In this polymer there are an average of 4.5 -OH groups that will 'react' with the M-NCO crosslinking agent. If the crosslinking agent has a molecular weight of 214.18 how many grams of the crosslinker are needed?
Please show the entire work. I am thanking you in advance
suppose .015 g of dichlorobenzene was combined with 10 ml ofdiethyl ether. this mixture was used to spot a tlc
What is the half-reaction of P(s) going to the most common ion for O? Hint: P is under N in the periodic table so, their most common charge should be the same.
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 4.00 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C? Use CP = 30.8 ..
if 76g of Cr2O3 and 27 g of al completely react to form 51 g of Al2O3 how many grams of Cr are formed?
You are hard at work separating diethyl ether and toluene by simple distillation. Your lab partner unfortunately spills some sodium chloride in the distillation mixture. Is simple distillation still appropriate or should you switch to fractional d..
how many milligrams of hydrazoic acid ( ka= 1.9x10^-5) must be in a 5.0-L solution that has a pH of 4.90?
What is the pressure in atmospheres inside a container of gas connected to a mercury-filled open-end manometer when the level in the arm connected to the container is 28.0cm higher than the level in the arm open to the atmosphere and the atmospher..
If a molecule having an ionization energy of 11.83 eV produces a photoelectron having a kinetic energy of 7.7697E-19 J, what is the wavelength of the incident radiation
A 30.0 mL sample of a diprotic acid is titrated with 0.255 M KOH. If 59.5 mL of base is required to reach the second equivalence point
On a trip of 287 miles, a driver maintains an average speed of 85.0 km/hr. How many minutes does the trip take
Determine the pressure in Standard atmospheres,Torr and mm Hg units when A gauge on compressed gas cylinder reads 1500 psi ( pounds per square inch; 1 atm =14.7 psi).
write a balanced half-reaction describing the reduction of gaseous dioxygen to aqueous oxide
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