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Poly(propylene) is made of one kind of monomer. Give the two monomers used to make nylon 6,6. Why are two monomers needed to make nylon 6,6 while only one is needed to make poly (propylene)?
Benzoyl peroxide, the substance most widely used against acne, has a half-life of 9.8 103 days when refrigerated. How long will it take to lose 7% of it potency (93% remaining)
Which one of the following pairs of acids and conjugate bases is incorrectly labeled or incorrectly matched?
Compute the unsaturation number (aka index of hydrogen deficiency) associated with C4H3NO2S. Interpret your results. If there are no triple bonds in this compound, can you suggest a reasonable structure for the compound
Write a balanced net equation for the reaction of Na2S with water. writing a net equation, and sodium ions are spectator ions.
A 34.62 mL of 0.1510 M NaOH was needed to neutralize 50.0 mL of an H2SO4 solution. What is the concentration of the original sulfuric acid solution?
A 235.0 ml sample of urine has a mass of 240.8 grams the specific gravity of the sample to three significant digits is
The % ionization of a weak acid always declines in a solution that contains the salt of the anion relative to a solution of the acid alone. For example the % dissociation of the acetic acid is less in a solution that contains sodium acetate than i..
Identify one acid-base conjugate pair. What is the conjugate base of the HNO2 acid
A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz, where 1 MHz=10^6 Hz. Calculate the broadcast wavelength of the radio station 99.90 FM.
it was found that at 344 seconds the concentration of dinitrogen pentoxide was 0.696 mol/L and at 708.1 seconds the concentration of dinitrogen pentoxide was 0.237 mol/L. What is the rate of decomposition over the specified time period in this rea..
the vapor pressure of pure methyl alcohol at 19?c is 90.0 torr and that of pure ethyl alcohol is 40.0 torr. assume a
An unknown protein sample gave an absorbance of 0.867 ( corresponding to the average of three replicate analyses of the unknown sample). Calculate the mass (micrograms) of protein in the unknown. Calculate the absolute uncertainty for the answer.
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