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A certain grade of polyethylene in the molten state obeys the following equations of state linking pressure P (in Pa), specific volume v (in m3/kg), and absolute temperature T in K. (10-3 + 3.2 × 105)(103 - 0.822) = 290 In the solid state, at 20°C the density is 970 kg/m3.
1) Find the free linear shrinkage of a block of polyethylene on cooling uniformly from 130°C to 20°C.
2) If it is injection moulded, find the packing pressure required in a moulding which is sealed with the melt at 130°C, to ensure that the linear mould shrinkage on cooling to 20°C does not exceed 2% (Assume uniform, i.e. slow, cooling)
in a combustion experiment it was found that 12.096 g of hydrogen molecules combined with 96.000 g of hydrogen
Calculate the osmotic pressure of a solution containing 19.10 of hemoglobin in 17.0 of solution at 19. The molar mass of hemoglobin is 6.5*10^4 g/ml
If the concentration of EDTA in the blood of the patient is 2.60x10^-8 M and the formation constant for the complex, {Pb(EDTA)}2- is 2.00x10^18, what is the concentration ratio of the free (and potentially toxic) Pb2+(aq) in the blood to the much ..
Complete the following calculation: a student wants to react mg(s) with 100ml of 1.5M hcl, but the intent is to have all the mg(s) react, while leaving 50% of the Hcl unreacted. How much Mg i grams should the student add to the HCl
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what is the conjugate base of HPO4^2-? c)which acid has the weaker conjugate base? d)which acid has the stronger conjugate base? e)which acid produces more ions
A mixture of barium and silver salt is water-soluble. Explain what anion(s) may be present in this mixture
when atoms of the hypothetical element x are placed together they rapidly undergo reaction to form the x2nbspmoleculea.
Because of environmental concerns, your plant must install an acetone recovery system. Your task is to calculate the size of the various components.
Calculate the standard cell potential (E^o) for the reaction X(s)+Y^+(aq)-->X^+(aq)+Y(s) if K = 5.33x10^-3
Precisely 1.00 x 10-3 mol of CaCl2, 0.100 mol of NaOH and 0.100 mol of Na3T were mixed as well as then diluted to 1.00 L. Explain what was the concentration of Ca(2+) in the resulting mixture
Determine the moles of H2O lost. E. Write the empirical formula for hydrated alum, based on your experiment.
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