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How do I calculate the viscosity average and number average molecular weights of polyvinyl alcohol given the molar mass of cleaved and uncleaved polymer solution. (Also given intrinsic viscosity concentration, other experimental data)
calculate the specific heat of a substance if a 35 gram sample absorbs 28 joules as the tempature is raised from 292 kelvin to 313 kelvin.
calculate the amount of heat required to heat a 43 sample of ethanol from 14.0 to 19.0. specific heat capacity of
What is the relationship between the atomic numbers and the ionic radius of the elements in a group.
Draw the resonance structures for 9-(hydroxymethyl)anthracene. Is it possible for all three rings to simultaneously have benzenoid character
spontaneous chemical reactions produce products which are more energetically stable than the reactants which form them. A strong acid reacts with a strong base to produce water and the free ions of a salt.
The resulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 12.26 mL of 0.08855 M potassium permanganate (KMnO4) to reach the purple endpoint.
The weak acid HZ has a ka of 2.55*10^-4. What is the pH of a .075 M HZ? What is the pOH of .045 M HZ?
Gasoline is composed of hydrocarbons. Which additive, ethanol or MTBE, is more compatible (similar) with gasoline? Why? Gas manufactures definitely prefer one of these additives over the other because of the ease of mixing
what volume would 7.6 grams of dry ice occupy if the density of solid co2dry ice is 1.561gml express your answer in
Two students were carrying out an Sn2 reaction between 1-chloro-3-methylbutane with sodium methoxide, which is relatively slow. When they added sodium iodide, the reaction was accelerated considerably. How is this catalysis best explained
Combustion analysis of toluene, a common organic solvent, gives 4.12mg of {\rm{CO}}_2 and 0.959mg of {\rm{H}}_2 {\rm{O}}. If the compound contains only carbon and hydrogen, what is its empirical formula
how to calculate mole fractions of two sustances given their weight percentages ,grams
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