Q4 /I Answer the following (choose three branches): A- Iron was formed at 912 ° C by the effect of heating from a crystalline structure (BCCA) type a crystalline type structure. During this fusion, a change occurred in the atomic radius of RBe = 0.1258nm to RFee = 0.1289nm. (FCC) Calculate the volume change ratio for this reaction? Is this interaction increase or decrease?

Q: What is the type of interactions holding Sr atoms together in the crystal?

A: Strontium (Sr) with atomic number 38 is a metal and it exists in crystal form.

Q: 4. NaCl(ag) + Kļcag) → NR

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

Q: please help? make the answer clear

A: Given element has BCC unit cell structure. Its density value is 7200 kg/m3 and unit cell volume is…

Q: Calculate the number density of valence electrons in a certain metallic element given that the…

A:

Q: A nonmetal element in the third row of the periodic table exists as two allotropes (two different…

A: Which allotrope do you predict likely exists as an extended network and why?1. Allotrope 1 because…

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

A:

Q: What is the "AXE" description of the orthotellurate (Te0%) anion?

A:

Q: If a small amount of CaO is added to an otherwise mostly silica glass, what will happen to the…

A: Silica glass, primarily composed of silicon dioxide (SiO2), has a complex three-dimensional network…

Q: Find the density and IPF values ​​for cristobalite.  (Si4+ ion radius: 0.039 nm, O2- ion radius:…

A: In case of Cristobalite, the structure is Si4O8. 3a/4 = (0.039 + 0.132) nm = 0.171 nm.        a =…

Q: P3.1: In the atmosphere, molecular oxygen is photochemically decomposed as follows: 02+hv0(D) +…

A: “Since you have posted a question with multiple sub-parts, we will provide the solution only to the…

Q: A silicon wafer with dimensions 10.00  cm × 10.00  cm × 0.0200  cm contains 0.166  moles of silicon.…

A: Given, A silicon wafer with dimensions 10.00  cm × 10.00  cm × 0.0200  cm  moles of Si = 0.166…

Q: Which of the following statements is TRUE? Select one: CCl4(s) has a higher melting point than…

A: True statement among the above options is

Q: 1- Na3AlF6 can be made by the reaction below: Al203 (s) + 6 NaOH (aq) + 12HF (6) → 2 Na:AlF, (s) + 9…

A: Moles of Al2O3 = Mass/Molar mass = 6.55g/(101.96gmol-1) = 0.0642 moles Moles of NaOH = Molarity  ×…

Q: Arrange the following in order of increasing rate of water exchange and explain your chosen order:…

A: The concept used in this question is taken from coordination chemistry .  Here we are asked about…

Q: e heat of reaction per

A:

Q: What cations appear in Biotite? K(Mg,Fe)3(AlSi3O10)(F,OH)2 Which cations occur in Biotite that also…

A: Biotite, also known as phlogopite, is a silicate-based minerals. The mineral is classified under…

Q: electron-volt = (a) If an electron passes through an electrical potential difference of 1 V, it has…

A: 4.(a)According to the given data if the potential difference 1v then Energy is 1eVwavelength=0.225nm…

Q: Cl-, Kr, Ne,At,p3-,s2-,k+ identify isoelectonic and arrange in order of increasing ionic radius

A: Isoelectronic Species are those in which number of electrons present are same. The atomic and ionic…

Q: D3 (aq) → H3ASO,(aq) + NO(g) -

A: First lets balance the reaction with NO3- and than we will see for NO2-  Balancing explanation :  As…

Q: What colour are SnC12.2H2O crystals?

A: SnCl2.2H2O called Sn(II) chloride dihydrate is also known as stannous chloride. The 2 H2O…

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: We collected a potassium feldspar crystal from unit M, which is a granitic pluton. The 40Ar/40K…

A: Given that : 40Ar / 40K = 0.214 The half life of 40K is 1.248 x 109 yrs

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.