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1. What structural characteristics of polystyrene, polyacrylonitrile, and polytetrafluoroethylene have an effect on the melting and glass transition temperatures?
2. What a material with a melting temperature of 102 degrees C and a glass transition of 8 degrees C be suitable as a vascular graft?
What volume (in mL) of water must be added to a 1.133 M solution of sodium chloride to make a 52.4 mL of a 0.52024 M solution? Assume the volumes are additive.
Write a balanced equation for the reaction of 2-octanol and surphuric acid. what products are formed?
The electron in a hydrogen atom occupies a 6p orbital. What is the longest wavelength of light that can be emitted by this atom? Give answer in nanometres, nm
Determine the pH of the solution before the addition of any HNO3. The Kb of NH3 is 1.8 × 10-5. a. 4.74 b.9.26 c.11.13 d. 13.00 e.12.55
for a hydrohalogenatoin reaction if you use br is it calles hydrobromination? or if you use cl is it hydrochlorination?
The solubility product of Mg(OH)2 is 1.2E-11. What minimum OH- concentration must be attained (for example, by adding NaOH) to decrease the Mg2+ concentration in a solution of Mg(NO3)2 to less than 1.9E-10 M?
Calculate the force of attraction (in N) between a cation with a valence of +2 and an anion with a valence of -2
Determine the heat of combustion per gram of octane and the heat of combustion per mole of octane?
calculate the mass of oxygen dissolved in a 5.00 l bucket of water exposed to a pressure of 1.13 atm of air. assume the
Compare volumetric glassware (volumetric flasks, pipets, burets) with other routine glassware (Erlenmeyer flasks, graduate cylinders, beakers) by sorting the qualities or properties into the correct bins.
The mass of Earth is 5.974 ô°€ 1024 kg. Assume that Earth is a sphere of diameter 1.28 ô°€ 104 km and calculate the average density of Earth in g/cm3.
Which of the following compounds would you expect to be ionic?
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