Which would you predict to have a higher melting point, SiO2 or CO2? Why? Please list the actual melting point values. Did your prediction agree Yes or No?

Q: s of an unknown crystalline substance showed that it is hard, has a high melting point, and is…

A: The compound is hard, has a high melting point, and is non-conducting unless melted means it shows…

Q: Estimate the boiling point of CS2.

A: Given: CS2

Q: True or False 1. The highest polarizability and expected to have the highest boiling point is Cl2…

A: 1. The highest polarizability and expected to have the highest boiling point is Cl2 among H2, N2,…

Q: 4. NaCl(ag) + Kļcag) → NR

A: The following answer is correct or not if incorrect then write complete balance equation with states…

Q: CO2 and SiO2 have similar formulae but very different melting points, why?

A:

Q: In this figure, a polar stratospheric cloud (PSC) ice crystal is displayed. Chemical reactions that…

A: To write A and B reactions:

Q: Which allotrope of sulphur is thermally stable at room temperature?

A: Sulfur exists in various allotropes. The most important among them are: Rhombic Sulfur (α-sulfur)…

Q: Calculate the number of vacancies per cubic me￾ter in gold (Au) at 900C. The energy for vacancy…

A:

Q: In XCI, which crystallizes in NaCl structure, the sum of the anionic and cationic radii is found to…

A:

Q: 5. Find the distance (in nm) between the body-centered atom and one corner atom in Na, given a30.424…

A: Given : Na atom in body centered atom and one corner atom .  To find : Distance (in nm)  Solution :…

Q: Distinguish  between the bond thos exist  In CsCl and SiC Crystals.

A: Chemical Bond: Chemical bonds are type of forces which hold two or more than two atoms to form a…

Q: In XCI, which crystallizes in CsCl structure, the sum of the anionic and cationic radii is found to…

A: Answer is explained below.

Q: 2 The Crystal Structure is BCC

A: The body-centered cubic (BCC) unit cell has atoms at each of the eight corners of a cube plus one…

Q: Discuss the following sentences: 1- In alumina manufacturing, calcination process is preferred…

A: Discussing the following statements.

Q: A hypothetical element, Le, has a body-centered cubic structure with a density of 7.89 g/cm3.…

A: Given;

Q: Name three metals and three nonmetals that are very likely to form ionic compounds. Write formulas…

A: Ionic compounds : Ionic compounds  are those crystalline solids which are formed by ions which are…

Q: 3/4 1/2 ty x+

A:

Q: An isotropic amorphous vitreous substance (meaning that it has the same refractive index regardless…

A: The term "isotropic amorphous vitreous substance" applies to materials exhibiting uniform properties…

Q: 3. Which of the following substances will have the lowest melting points: H20, CuSO4-5H20, or CaF2?…

A: The solution is given below -

Q: Have each group member select and study a material from the section on ceramics, cement, and glass.…

A:

Q: Is interatomic bonding in ceramics always ionic? Or is that false?

A: Ceramics : These are very brittle , corrosion resistant material made from inorganic non metallic…

Q: . Using the Born-Mayer Equation, calculate the lattice enthalpy for sphalerite (zinc blende), ZnS.…

A:

Q: The later halogens form pentafluorides CIF5, BrF5 and IF5 at 0°C, one of these is a solid, one a…

A: The later halogens form pentafluorides CIF5, BrF5 and IF5 at 0°C, one of these is a solid, one a…

Q: Answer the fóllowing questions: |(a) If the crystal lattice constant for a metal is equal to (4.5…

A:

Q: Describe the singularity of the band in 'K, K', which is graphene's 'Brillouin Zone edge'. Please…

A: Brillouin zone is uniquely defined primitive cell in reciprocal space. In the same way the Bravais…

Q: Which compound has the highest melting point: NaCl, CH 4, or H 2SO 4?

A: The melting point depends on the strength of intermolecular forces. Higher the intermolecular force,…

Q: On the basis of ionic charge and ionic radii, predict the crystal structure for KI by answering the…

A: Answer:Three dimensional arrangement of the ions or atoms of a solid is called as its crystal…

Q: Rank the following in order of DECREASING MELTING POINT CO2H сно CH3 CH2OH Br Br Br Br 2 3

A: Given : Some compounds are given  To find : Decreasing melting point  Solution : Melting point is…

Q: What important information does the melting point of a substance provide?

A: Melting point of a substance is a defined as the temperature at which a solid melts. It is a…

Q: The ionic compound, CsI, forms a body centered cubic structure (see below) where the anions occupy…

A:

Q: Q1/A B) Describe the Bohr model of hydrogen atom. What are the shortcomings of the Bohr model? Prove…

A: (a) Bohr model of hydrogen atom:Electrons orbit the nucleus in specific, fixed energy levels called…

Q: Please don't provide handwriting solution

A: The objective of the question is to identify the metal based on the given properties and the atomic…

Q: How does the sea-of-electrons model explain the high electrical conducitivity of gold ?

A: Metallic bonding is a type of chemical bonding, the cations in the metal are surrounded by many…

Q: In the BCC crystal structure, atoms touch along which direction? O [111] O [011] O (001) O (111) O…

A: In this question, we have to choose the correct answer from the given option.

Q: 4. Why do FCC and HCP have identical atomic packing factors (0.74) if they have different crystal…

A: The Face-Centered Cubic (FCC) and Hexagonal Close-Packed (HCP) structures have identical atomic…

Q: Which has the smallest radius of the following? O Mn O Mn 2+ Mn 3+ jes.

A: As the positive charge increase on element radius decreases due to increase in  nuclear charge. So,…

Q: What is the crystalline structure of Chromium? HCP Cubic BCC FCC

A: Crystalline structure of Chromium:

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.