Please note that it is correct and explains it rightly:The proportion of O, C and H in the graphite oxide is:a) Constant, for the quantities of functional groups of acids, phenols, epoxy, etc. its constantsb) Depending on the preparation method, as much oxidant as the graphite is destroyed and it has less oxygenc) Depends on the structure of the graphic being processed, whether it can be more three-dimensional or with larger crystals, or with smaller crystals and more borders.

Please note that it is correct and explains it rightly:The proportion of O, C and H in the graphite oxide is:a) Constant, for the quantities of functional groups of acids, phenols, epoxy, etc. its constantsb) Depending on the preparation method, as much oxidant as the graphite is destroyed and it has less oxygenc) Depends on the structure of the graphic being processed, whether it can be more three-dimensional or with larger crystals, or with smaller crystals and more borders.

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

Chapter22: Inorganic Materials

Section: Chapter Questions

Problem 44AP

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The proportion of O, C and H in the graphite oxide depends on the structure of the graph that is processed, which may be more tridimensional or with larger crystals, or with smaller crystals and more borders. ¿Is it correct?
Please do not give solution in image format thanku Minerals are grouped by their chemical composition. The major groups or families of mineralsinclude the Silicates, Oxides, Sulfates, Sulfides, Carbonates, Native elements, and the Halides.Match the following chemical formulas from a variety of minerals to the mineral family to which theybelong based on their chemical formula.Fe203PbSCaCO3(Mg,Fe)2SiO4AuCaSO4 H2ONaClOxidesSulfidesCarbonatesSilicatesNative elementsSulfates[Choose ]
(c) Three-dimensional hexagonal boron nitride is made up of sheets of the two- dimensional material described above. X-ray diffraction is used to measure the distance between adjacent rows of boron atoms in the layers, and the distance between the two-dimensional sheets. i. Draw diagrams to show how a single-crystal sample of BN must be orientated with respect to the incident and scattered beams in order to make these measurements.
Please note that it is correct and explains it rightly:Indicate the correct option. The proportion of O, C and H in the graphite oxide is:a) Constant, for the quantities of functional groups of acids, phenols, epoxy, etc. its constants.b) Depending on the preparation method, as much oxidant as the graphite is destroyed and it has less oxygen.c) Depends on the structure of the graphic being processed, whether it can be more tridimensional or with larger crystals, or with smaller crystals and with more edges.
Why does silica operate at highly temperature
Most ceramic materials have low thermal conductivities because(a) Electron mobility is strongly restricted due to their strong ionic-covalent bonding.(b) False, in general they are excellent thermal conductors (they are used in ovens).(c) Electron mobility is dependent on T and therefore they are poor conductors at high temperatures.(d) Electron mobility is highly restricted by secondary bonds.
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Question Seven (a) For refractory ceramic materials, cite two characteristics that improve with and two characteristics that are adversely affected by increasing porosity. (b) Show that the minimum cation-to-anion radius ratio for a coordination number of 4 is 0.225. (Hint: Use the AX crystal structure, assuming the anion spheres touch in plane). (c) The unit cell for Al>O; has hexagonal symmetry with lattice parameters a = 0.4759 nm and c 1.2 nm. If the density of this material is equal to 3.99 g/cm' and is calculated according to the formuka n'(EAc+ EA) VcNA Calculate the atormic packing factor for Al>O1, given that the ionic radius for AI is 0.053 nm and i 0' is 0.140 nm. Take N = 6.023 x 1023 atoms'mole. (d) Mention any three industrial ceramics and indicate their applications.
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A particular form of cinnabar (HgS) adopts the zinc blendestructure. The length of the unit cell edge is 5.852 Å.(a) Calculate the density of HgS in this form. (b) The mineraltiemannite (HgSe) also forms a solid phase with the zincblende structure. The length of the unit cell edge in thismineral is 6.085 Å. What accounts for the larger unit celllength in tiemmanite? (c) Which of the two substances hasthe higher density? How do you account for the differencein densities?
Consider we have a silicate glass composition, this composition as shown below in percent by weight 15Na₂O +5K₂O + 2.5MgO +9.5 CaO +6 BaO + 5Al₂O3 +57 SiO₂. First, convert this composition to mole percent. Then classify each oxide added to the glass according to Sun's bond criteria. According to this classification, is this composition make glass or not? Min MO K Mg Ca Al Si Valance 1 1 2 2 2 3 4 Dissociation energy per MOX (in Kcal.) 120 115 222 257 260 402 424 Coordination Number 6 9 6 8 8 4 4 Molecular weight of oxides is shown below Oksitier (Molekil Agri): NajO (61.97), K,0 (94.18), MgO (40.31), CaO (56.08), Bao (153.33), ALO, (1015), 50, (60.08) Single Bond Strength (Kcal/mole) 20 13 37 32 33 101 106
Consider we have a silicate glass composition, this composition as shown below in percent by weight 15Na₂O +5K₂O +2.5MgO +9.5 CaO +6 BaO + 5Al₂O3 +57 SiO₂- First, convert this composition to mole percent. Then classify each oxide added to the glass according to Sun's bond criteria. According to this classification, is this composition make glass or not? Min MO K Mg Ca Al Si Valance 1 1 2 2 2 3 4 Dissociation energy per MOX (in Kcal.) 120 115 222 257 260 402 424 Coordination Number 6 9 6 8 8 4 4 Molecular weight of oxides is shown below Oksitler (Molekül Agri): Na,O (61.97), KO (94.18), MgO (40.31), CaO (56.08), Bao (153.33), ALO, (10156), 50, (60.08) Single Bond Strength (Kcal/mole) 20 13 37 32 33 101 106