Question
In: Chemistry
Q. A polydisperse sample of PS is prepared by mixing three monodisperse samples in the following...
Q. A polydisperse sample of PS is prepared by mixing three monodisperse samples in the following proportions:
A : 1 g, 10,000 molecular weight PS
B : 2 g, 50,000 molecular weight PS
C : 2 g, 100,000 molecular weight PS
Using this information, calculate the number-average MW, weight-average MW and PDI of the mixture.
Solutions
queen_honey_blossom answered 9 months agoRelated Solutions
3. Two samples are prepared by mixing monodisperse versions of three polyX’s with molecular weight =...
3. Two samples are prepared by mixing monodisperse versions of
three polyX’s with
molecular weight = 20,000, 50,000 and 95,000 g/mol. Calculate
the number and
weight average molecular weights for sample mixtures prepared
from:
a) Equal number of moles (or molecules) of the three
monodisperse polyX’s
b) Equal weights of the three monodisperse polyX’s
Assume the following three samples of data: Sample A: 4, 5, 6, 7, 8 Sample B:...
Assume the following three samples of data:
Sample A: 4, 5, 6, 7, 8
Sample B: 3, 5, 6, 7, 9
Sample C: 2, 5, 6, 7, 10
Which of the above samples (A, B, or C) will have the smallest
variance (s2)?
Sample A
Sample B
Sample C
The variance of the three samples will be the same
Calculate the pH of the buffers prepared in the following ways: A. By mixing 50.00 mL...
Calculate the pH of the buffers prepared in the following
ways:
A. By mixing 50.00 mL of 0.200 M ammonium nitrate, NH4NO3, with
25.00 mL 0.200 M NaOH
B. By neutralizing half of the acid in 100.00 mL of 0.200 M
ammonium nitrate solution with 1.0 M NaOH
C. By mixing 60.00 mL of 0.400 M sodium formate (NaCHOO) with
40.00 mL 0.360 M HCl
D. By mixing 80.00 mL of 1.00 M NH3 with 40.00 mL of 1.00 M...
A movie theater faces the following demand curves: Seniors: Ps = 27-Q Adults: Pa = 33...
A movie theater faces the following demand curves: Seniors: Ps =
27-Q Adults: Pa = 33 - Q The theater has a fixed cost of 50, and a
constant marginal cost of 1 per ticket. a) If the movie theater
uses segmenting, calculate the ticket prices charged to adults and
seniors. b) How much profit does the movie theater earn from
segmenting? c) Illustrate the profit maximizing choices on both
inverse demand functions along with CS and profit. d) Suppose...
Consider the following means and sample sizes for two independent samples (with the samples being denoted...
Consider the following means and sample sizes for two
independent samples (with the samples being denoted by the
subscripts "X" and "Y"):
MX = 6.286, MY= 1.973,
nX= 16, nY= 16. If the
standard error (sDifference) is 2.256, what is
the the upper boundary of the corresponding 95% confidence
interval? Please use a typical null hypothesis that predicts no
differences between the two populations when computing your answer.
When calculating your answer, please ensure that you subtract the
mean for...
what is the concentration of each substance if a solution is prepared by mixing 5.00g of...
what is the concentration of each substance if a solution is
prepared by mixing 5.00g of NaC2H3O2 with 15.0 ml of 1.45M acetic
acid and then bringing the total volume to 250.0 ml?
Please show work
What is the pH of a buffer that is prepared by mixing 30.0 mL of 1.0...
What is the pH of a buffer that is prepared by mixing 30.0 mL of
1.0 M HF and 20.0 mL of 2.0 M KF? (Ka for HF 7.2 x
10−4)
What is the pH of a solution that contains 0.40 M CH3COOH and
0.30 M CH3COONa at 25°C (Ka=1.8 x 10−5)?
What is the pH of a buffer that is prepared by mixing 30.0 mL of 1.0...
What is the pH of a buffer that is prepared by mixing 30.0 mL of
1.0 M HF and 20.0 mL of 2.0 M KF? (K a a for HF 7.2 x 10 −4 )
a) What is the pH of a buffer solution prepared by mixing 120 mL of a...
a) What is the pH of a buffer solution prepared by mixing 120 mL
of a 0.435 M CH3CO2H with 50 mL of a .286 M
CH3CO2Na solution?
CH3CO2H Ka = 1.75 x
10-5
b) What is the resulting pH if we add 10.2 mL of a .513 M HCl
solution to this buffer? Does the pH make sense? Why/why not?
c) What is the resulting pH if we add 3.56 mL of a 0.420 M NaOH
solution to the...
The solvent for an organic reaction is prepared by mixing 50.0 of acetone () with 61.0...
The solvent for an organic reaction is prepared by mixing 50.0
of acetone () with 61.0 of ethyl acetate (). This mixture is stored
at 25.0 . The vapor pressure and the densities for the two pure
components at 25.0 are given in the following table. What is the
vapor pressure of the stored mixture?
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 1. Many operating systems now operate on 64 bits of memory. What is the highest base...
- 1. The empirical rule says that 95% of the population is within 2 standard deviations of...
- What are some adaptive traits for tigers what are some adaptations of a tiger
- Question I'm having trouble with: Using LISP, write a recursive function that takes a list and...
- Gatekeeping: What are the causal effects of AI (Artificial Intelligence) in hiring processes and how can...
- Write code that would go where the comment "#your line will go here" so that the...
- The tires of a car make 78 revolutions as the car reduces its speed uniformly from...
ADVERTISEMENT