Week 1 Chapter 43 Quiz _ 117

Chemistry Calculate Mn Mw Mz n1 100 80 70 50 30 M1 50 40 30 20 10 Example 2. Calculate Mn, Mw for mixtures having one part of A and two part of B. Monodisperse Polymer A (molecular weight: 100,000) Monodisperse Polymer B (molecular weight: 400,000)

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What are the ideal factors to consider for ranking these glove materials for toluene exposure

with aucu talline metallic materials? Describe the mechanism of grain boundary What are the main effects of the introduction of grain boundaries in polycrys strengthening.

A bead resin with functional group R-CH2-SO3- will have highest relative capacity at pH ___.     8     2     10     7

Describe the injection moulding process and distinguish between the injection moulding of TP and TS polymers.

Which among the options for minimzing errors (Separation, Saturation-Mix Modification-Masking, Dilution and Matrix Matching, Internal Standard Methods, Standard Addition Methods) is most helpful with more advantages than disadvantages?

Explain etch process removing copper ferrite chloride? Why a mask used? Why is a negative image required? Why anything black removed and anything white will be copper? If two layers, why does top layer have to be mirrored so that ink surface on tracing paper touches photoresist?

Bromine H2O + Cl2 H20 ----- __________.  A. violet and reddish brown layered solution B. No reaction

GUIDE QUESTIONS 1. What type of precipitate is BasO4? 2. Why is a filter paper preferred over a sintered glass filter? 3. What made an ashless filter paper ashless? 4. What does the number in a filter paper's brand represent? 5. Why is a porcelain crucible used in this procedure? 6. Why do we need to precipitate from a hot solution? 7. Why is the precipitating agent added all at once? 8. What is the purpose of adding 6M HCI in the sample solution? 9. Why do we need to test the washings with AgN0:? 10. What is done in an ignition process? 11. What is the product after the precipitate was ignited? 12. What are the advantages of performing ignition? 13. Cite the sources of errors for this experiment and explain how to possibly circumvent these kinds of problems.

pls show the process, thank you. I have tried two other options and they have not worked

Vulcanization imparts stretchiness and stability to polymers and uses sulfur. SHOW ALL WORK: I. Give the Lewis dot diagram (~structure) of the element sulfur (that is, just ONE sulfur atom). I. a. Then give the Lewis dot structure for STe. Show ALL work / steps. b. Is STe polar or non-polar. Back up with some work (hint: shape?).