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Determine a polymer with a number average molecular weight of 6,200 Daltons. The polymer is made of two different fractions. The first fraction has 40 molecules while the second one has 60 molecules with molecular weight of 7,000 Daltons. Compute
1. (a) Find the number of molecules making the first fraction of this polymer
2. (b) Find the weight average molecular weight.
a sample containing 4.80 g of gas has a volume of 15.0 l. pressure and temperature remain constant. what is the new
Depict both possible chair conformations of trans-1-boromo-4-methylcyclohexane and circle the one that is the most stable.
Solid CaF2 is shaken with a 0.010M solution of NaF. What will be the concentration of Ca2+ ion in the resultant saturated solution? (Ksp for CaF2 = 4.0 x 10-11)
The 20 mL of water added to the Erlenmeyer flask is to be previously boiled, deionized water. Since water does absorb CO2 from the atmosphere and since CO2 dissolved in water causes it to be slightly acidic,
The U.S. Food and Drug Administration lists dichloromethane (CH2Cl2) and carbon tetrachloride (CCl4) among the many chlorinated organic compounds that are carcinogenic (cancer-causing).
question describe in details how we can determine the acid dissociation constant ka for a week acid ha include the
the atomic masses of 6Li and 7 Li are 6.0151 amu and 7.0160 amu. Calculate the neutral abundance of each isotope. The average atomic mass of Li is 6.941 amu
Write the balanced net ionic equation for the standardization of the sodium thiosulfate solution by combining IO3-(aq) + 8I-(aq) + 6H+(aq) ----->3I3-(aq) + 3H2O(l)
The dehydration of trans-2-methylcyclopentanol with H2SO4 will give what major product? a) cyclopentene b) 1-methylcyclopentene c) 2-methylcyclopentene d) 3-methylcyclopentene
the bottom layer was removed, and the aqueous layers were combined. HCl (2M) was added to the aqueous layer with stirring to acidify the solution. The solid was collected by suction filtration and then air-dried. What is the overall reaction and w..
An unopened soda can has an aqueous CO2 concentration of 0.0506 m at 20 celcius. What is the pressure of CO2 gas in the can
Using the equation pKa= -log Ka, calculate the Ka from the pH value and the starting acetic acid concentration. Calculate the Ka of acetic acid.
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