TrueFalseGranules may be swallowed,dispersed in food, ordissolved in water.Granules are usually lessstable to the effects ofatmospheric humidity.An effervescent dosage formis dissolved or dispersed inwater to initiate theeffervescence prior toingestionA waxed paper is preferredfor deliquescent powders.The selection of the type ofpaper is based primarily onthe nature of the powder.Eutectic mixtures are advisedto use double wrap papers.Large particles that aredenser tend to settle morerapidly than do smallparticles.denser teneto settle morerapidly than do smallparticlesHygroscopic powders willabsorb moisture from the airPowders of small particlesize present a lesser surfacearea to the atmosphere.

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Answered: True False Granules may be swallowed,…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter21: Structure And Bonding In Solids

Section: Chapter Questions

Problem 57AP

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Sketch the phase diagram of the sys tem NH3/N2H4 given that the two substances do not form a compound with each other, that NH3 freezes at -78 °C and N2H4 freezes at +2 °C, and that a eutectic is formed when the mole fraction of N2H4 is 0.07 and that the eutectic melts at - 80 ° C.
Please just indicate if it's True or False. a. When placed in a glass capillary tube, H2O will form a concave meniscus. b. A detergent-water solution has a higher surface tension than pure water. c. Considering (I2, CsBr, CaO), the substance with the smallest enthalpy of fusion is I2. d. Considering (CCl4, CBr4, CF4), the substance with the highest boiling point is CF4. e. Considering (simple cubic, face-centered cubic, hexagonal closed packed) structures, the least efficient packing is the simple cubic. f. In p-type semiconductors, the dopant element typically contains three-valence electrons. g. The critical temperature is the temperature above which the vapor cannot be solidified no matter the applied pressure. h. In the band model, the electrons are assumed to occupy molecular orbitals. i. Conduction bands are closely spaced molecular orbitals with filled electron spaces. j. In the electron sea model, the valence electrons in metals are assumed to be fixed in the lattice points.
The boiling points, surface tensions, and viscosities ofwater and several alcohols are as shown below:(a) From ethanol to propanol to n-butanol the boilingpoints, surface tensions, and viscosities all increase. Whatis the reason for this increase? (b) How do you explainthe fact that propanol and ethylene glycol have similarmolecular weights (60 versus 62 amu), yet the viscosity ofethylene glycol is more than 10 times larger than propanol?(c) How do you explain the fact that water has thehighest surface tension but the lowest viscosity?
The boiling points, surface tensions, and viscosities ofwater and several alcohols are as shown below: (a) From ethanol to propanol to n-butanol the boilingpoints, surface tensions, and viscosities all increase. Whatis the reason for this increase? (b) How do you explainthe fact that propanol and ethylene glycol have similarmolecular weights (60 versus 62 amu), yet the viscosity ofethylene glycol is more than 10 times larger than propanol?(c) How do you explain the fact that water has thehighest surface tension but the lowest viscosity?
A mass m = 0.056 kg of benzene vapor at its boiling point of 80.1 °C is to be condensed by mixing the vapor with Water at 38 °C. What is the minimum mass of water required to condense all of the benzene vapor? Assume that the mixing and condensation take place in a perfectly insulating container.
Sketch the phase diagram of the NH3/N2H4 given that these two compounds do not react with each other. NH3 freezes at -78.000C while N2H4 freezes 2.000C. The eutectic is formed when the mole fraction of N2H4 is 0.07 and the eutectic melts at -80.000C. Label all the regions in the phase diagram and indicate which species are present and in which physical state.
The smectic liquid crystalline phase can be said to be morehighly ordered than the nematic phase. In what sense isthis true?
At 25°C and a pressure of 760 mm Hg, the density ofmercury is 13.5 g/mL; water at the same temperatureand pressure has a density of 1.00 g/mL. Explain thisdifference in terms of intermolecular forces and thekinetic-molecular theory.
Roughly draw the phase diagram of a pure compound and predict the solid-liquid-gas states, including the triple point and critical temperature.
Why would industry prefer to purify solids by sublimation or zone refining rather than recrystallization? (Hint: is there anything wasteful about recrystallization)
Explain how a process of fractional sublimation might be apllied to a mixture of two substances which sublime closely together.
Increasing temperature in general reduces the viscosity of polymer solutions. How might the magnitude of this effect compare in a ''poor" solvent and a "good" solvent? (The principle invoked by this exercise is the basis for multiviscosity motor oils.)

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True False Granules may be swallowed, dispersed in food, or dissolved in water. Granules are usually less stable to the effects of atmospheric humidity. An effervescent dosage form is dissolved or dispersed in water to initiate the effervescence prior to ingestion