What happens if graphite is subjected to very high pressure st room temperature (+-25)

Q: estimate the fraction of electrons above fermi level in sodium and copper at room temperature

A:

Q: The band gap for the elemental semiconductor silicon is 1.11 eV. That energy corresponds to what…

A: The band gap energy can be defined as the minimum amount of energy needed by an electron to break…

Q: he equilibrium density of vacancies ns is given by Nexp(-Es/kT) , where N is the density of…

A: The equilibrium density of vacancies is calculated by the formula: Ns=Ne-EskT Where k is the…

Q: Some oxide superconductors adopt a crystal structure similar to that of perovskite (CaTiO3). The…

A: Ti4+ ion in each corner = 18×8 =1 Ca2+ ion in the body center = 1 O2- ions at the midpoint of each…

Q: Q-6 Based on the experimental data below for Aluminum, determine (using Excel and by hand) the…

A:

Q: 15 write the equilibrium exprassion tor each of the he trogenses equilia P4 (5) + Gfz (g)2 4PFy(g!…

A: Pure solids and liquids are excluded from the equilibrium expression because their effective…

Q: coal? CO

A:

Q: What is semi-conductor?

A: Conductors are those substances which allow the flow of heat and electricity through them while…

Q: Define the term empiricalchemical formula What is the shape of the SiO4 unit in complicated silicate…

A: The objective of the question is to find the term of empirical chemical formula.The chemical formula…

Q: What are some of the structural differences between quartz and amorphous SiO2?

A: A question based on solid state, which is to be accomplished.

Q: Calculate the lattice enthalpy of AgCl (s) using the following thermodynamic data. Note that the…

A: Lattice enthalpy : The amount of energy required to completely separate one mole of the solid ionic…

Q: Distinguish between the rock salt structure and the caesium chloride structure for ionic solids

A: Strucure of rock salt(NaCl) :- The radius ratio (radius of cation/radius of anion) of rock…

Q: 1) Palladium (electron configuration is [Kr]4dv) crystallizes in a face-centered cubic unit cell.…

A:

Q: Name the two most important allotropes of sulphur. Which one of the two is stable at room…

A: The two most important allotropes of sulfur are given below, That is, Rhombic form and Monoclinic…

Q: Niobium crystallizes in BCC structure and has a density of 8.55 g/cm^3. Calculate its atomic radius…

A: Given  Structure type = BCC density ( d ) = 8.55 gram/cm3 Atomic mass ( M )  = 93 gram/mole Atomic…

Q: A silicon sample maintained at 300 K is characterized by the energy band diagram in Rg.4-48:…

A: a. Yes the eqilibrium conditions previl because of the fermi level is contant with position.

Q: The density of lead is 11.35 g cm-3 and the metal crystallizes with fee unit cell. Estimate the…

A: Given: Density of lead=11.35 g cm-3 mass of lead=207 g mol-1 NA= 6.02×1023 mol-1 To find: The radius…

Q: <p>Explain why the graphite structure of carbon allows graphite to be used as a lubricant, but…

A: In graphite, flat sheets of carbon are connected together in the form of interconnected hexagonal…

Q: Crystals of a substance changed their colour on heating in a closed testtube but regained it after…

A: A chemical reaction involves the reactants, substrates, catalyst, temperature-pressure conditions,…

Q: For the common allotropes of carbon (graphite and diamond), C(gr) ⟷⟷ C(dia) with equilibrium…

A: The question is based on the concept of Le-chatlier principle.   It States that when a system at…

Q: Crystal structure of Alo.5G.0.5As Based on the zincblende crystal structure for GaAs, sketch the…

A:

Q: What is metallic glass? Describe the features that promote high glass-forming ability in metals.

A: Metallic glass: It is an amorphous metal alloy. The atoms in the materials are decorated by…

Q: Which of the following is most suitable for crosslinking Si-O-Si chains in silicone polymers?…

A:

Q: Please draw and explain the formula units of the double perovskite structure of Cs2AgInCl6 per unit…

A: The objective of the question is to understand the formula units of the double perovskite structure…

Q: Which of the following are allotropes? Group of answer choices B, Si & Ge diamond, graphite and…

A: Given : We have to tell which of the following are allotropes.

Q: What allotrope of tin is most stable at low temperatures? O Gray White Brown Tin does not have…

A: First, we need to check the allotropes of the tin and then we need to check which one is stable at…

Q: What is the difference between tetrahedral and octahedral voids?

A: The difference between tetrahedral and octahedral voids can be shown in below

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.