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Sulfur is used to crosslink isoprene (C5H8) units in naturally occurring rubber to make vulcanized rubber, which is a harder material. If it takes 4 sulfur atoms to form a crosslink with 1 isoprene unit, what mass of sulfur is required to form a crosslink with every isoprene monomer unit in 10g of rubber?
a) 18.8 gb) .09 gc) 1.0 gd) 4.0 ge) .36 g
Note that the absolute stereochemical configurations of chiral substances cannot be determined from the data. Arbitrarily draw a configuration for an enantiomer (and be consistent with the derivatives); omit wedge/dash bonds for a racemate.
A certain mass of oxygen was collected over water when potassium chlorate was decomposed by heating. The volume of the oxygen sample collected was 720. mL at 25.0 oC and a barometric pressure of 755 torr.
53.6 g sodium nitrate is dissolved in water to make 654 g of solution.What is the percent sodium nitrate in the solution.
vessel above eqm is established and at eqm, partial pressure of SO3 and SO2 are same, calculate no. of moles of O2 present at eqm
one potential way to reduce the amount of co2 added to the atmosphere is to store it as a compressed gas in underground formations.
glycerol has a density of and a molecular weight of. If mL are mixed with a kg of water, what is a good estimate of the temperature at which this solution with freeze?
they are stable molecules with normal bonds and are frequently isolated. d. all reactions involve reaction intermediates, but not all have activated complexes. e. they are intermediate structures which have characteristics of both reactants and pr..
The carbon and amino nitrogen of muscle alanine are radiolabeled with 14C and 15N respectively. Outline the metabolic journey that could result in the presence of
What mass of solid sodium formate (of MW 68.01) must be added to 140 mL of 0.57 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 4.16? Ka = 0.00018 for HCOOH.
A sports beverage company is seeking an energy supplement to increase the performance of the athletes. An ongoing research project suggest the use of a tetrasaccharide with the following characteristics
calculate the heat energy released when 15.1g of liquid mercury at 25 degrees C is converted to solid mercury at its melting point
In relation to the oxygen atom forming the linkage between glucose molecules, how are the hydrogens attached to the same carbon
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