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- Volatile and semi-volatile compounds can be analyzed by GC4. When performing a melting point on a solid compound using a melting point apparatus, two melting point determinations were made. One sample, which was 1 mm in height in the capillary, possessed a melting point of 200.0-200.5°C. The other sample was 25 mm in height. What would you expect the approximate melting point to be for this sample, assuming identical heating rates of 1°/min? (Hint: heat is applied from the bottom of the sample) (Give an actual numerical approximation!) 5. For the same solid compound as the question above, if the 1 mm sample was heated at 60° per minute on a melting point apparatus, what would you expect for an approximate melting point? (note that at this heating rate, the sample will melt rather quickly, but again give an actual numerical approximation)5. Explain the determination of molecular weight of polymer samples usingdilute viscosity measurement.
- Aow mapy Jeitlgaules of cney వింగా ore Fagaried to coniert a l00 gum gream Sample of pure ligwd boptare 6aad at 20O oCto hapta e vogaar heptere vop 98-40C? [useus bata heptare CMW=100):normal boilug point=is the study of fundamental principles of nanostructures between bulk and atomic properties.relation between melting temperature Tm and maximum crystallization temperature of polymer
- Describe a binary eutectic diagram and show all phase regions with all the relevant information for each.(b) TABLE 3 shows data phase equilibrium diagram for carbon dioxide. TABLE 3 Pressure (atm) Temperature (°C) Triple point Critical point 5.2 -57 73 31 (i) Sketch a phase diagram for carbon dioxide (ii) Explain the phase changes that could possibly occur when a sample of carbon dioxide in a closed vessel under 1 atm pressure and a temperature of -78°C is pressurised isothermally to 10atm, followed by isobaric heating to 20°C.(in ML) evo/index.html?deploymentld%35575082893418928890996 2&elSBN=9781305657571&nbld%3D2199898&snapshotld%3D21998... * INDTAP Q Search this co Use the References to access important values if needed for this question. Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as a primary standard. Its formula is H2C204•2H2O. A student dissolves 0.210 grams of H,C,O4•2H¬O in water and titrates the resulting solution with a solution of sodium hydroxide of unknown concentration. If 27.3 mL of the sodium hydroxide solution are required to neutralize the acid, what is the molarity of the sodium hydroxide solution ? M Submit Answer 5 question attempts remaining Ne
- Q3 Draw the phase diagram for metals (A. B) with melting points (1180°C, 1455°C respectively). They are completely soluble in cach other in solid stale. Follow up the cooling of alloy with 60% B: 1- Find the melting range of alloy with 20%A (start of solidification, end of solidification). 2- 2- Find the Percent, chemicals composition of liquid and solid at 1300°C for alloy with 60%B 3- Draw the microstructure for alloy 30% B at room temperature.7.Factors to consider in the selection of appropriate methods in specific gravity determination, excepta.Densityb.Polymorphismc.Physical form of the solidd.Solubility in water or the other liquid8.Specific gravity of a solid in flotation method is compared indirectly with a liquid known specific gravity. When the solid will neither sink or rise in the liquid, the specific gravity of the solid is different as the liquid.a.The first statement is correctb.Both statements are incorrectc.Both statements are correctd. The second statement is correctFiltration of samples A, B, and C show no residue left. After letting them dry in different beakers, SAmple A remains no residues. Sample B shows crystal leftovers, and sample C show brown film on the beaker walls. This means that: a. Two or more samples are heterogenous b. Two or more samples are homogenous c. all sample have 2 or more phases d. all samples are pure
