MCQ 15: in Group IV, the highest melting point is of A. Carbon(Diamond) B. Tin (Sn) C. Lead (Pb) D. Silicon (Si)

Q: 1400 Mo [D] H. [C] Pressure (in mm Hg) 1000 [A] 800 600 400 [B] E. 200 - 20 60 100 140 180 260…

A: Melting point is defined as the temperature at which a solid substance melts. In the given phase…

Q: Aow mapy Jeitlgaules of cney వింగా ore Fagaried to coniert a l00 gum gream Sample of pure ligwd…

A: Materials possess definite specific heat at a particular phase. This value distinguish whether that…

Q: 1. Metals are bonded by metallic bond, that is protons in a sea of electrons which give them their…

A: Given:

Q: What is the melting point of the substance modeled by this heating curve? F. 150 D E 135 120 105 90…

A:

Q: The AHfus of gold is 12.55 kJ-mol1, and its ASfus is 9.384 J-mol1.K-. What is the melting point of…

A: The term enthalpy of fusion for a given substance can be defined as the change in enthalpy which is…

Q: [References] It is sometimes necessary to take powers or roots to solve chemistry problems. Take…

A: Calculate the given question which is part of chemistry as mentioned in the question -

Q: F. 150 135 120 105 90 75 C 60 45 30YA 15 Heat (kJ) Created by E. Lee for Virtual Virginia (2021)…

A: This curve is the example of heating curve. This is because in y direction temperature is increasing…

Q: Refer to the hexagon pattern below. Assume that each edge of the hexagon measures 1 cm. Assume that…

A: Perimeter of any geometrical figure is sum of the length of its sides . A hexagon has 6 sides and…

Q: ali 83% ppun21@ole. COR Melting Point Ranking Highest Melting Point CaCl2 2. KI PCI3 CH4 HO HN Cl2 4…

A: The temperature at which solid is changed into liquid is known as melting point of that  substance.

Q: what does it imply when people talk about a "homogeneous structure?"

A: Homogeneous means uniform throughout the body/struure. In homogeneous structure same kind of…

Q: 3. Compare the melting points of the following molecules and explain the reason: NaCl, KCI, CSCI. D…

A:

Q: Ammonia 1NH32 boils at -33 °C; at this temperature it has adensity of 0.81 g>cm3. The enthalpy of…

A: GIVEN: Density of NH3 = 0.81 g/ml Heat of Formation of NH3 = -46.2 kJ/mol 1/2N2(g)  + 3/2H2(g)…

Q: What is the direction of water in the set up? * 3 5 7 from 5 to 7 from 7 to 5 from 2 to 9 O from 9…

A: Since you have posted multiple questions, we are entitled to answer the first only. The experimental…

Q: Gold forms a face-centered crystal structure and has an atomic radius of 2.75 x 10-$ cm. Compute for…

A:

Q: Which parts of Earth are most similar to the plate with an axis angle of 80°?

A:

Q: ation.com/ext/map/index.html?_con%3Dcon&external_browser%3D08launchUrl%3https%253A%252F%252Fatlantat…

A: We know that  pi bonds are covalent chemical bonds where two lobes of an orbital on one atom overlap…

Q: See Periodic Table See Hint Items (4 images) (Drag and drop into the appropriate area below) H,C H,C…

A: Huckel's rule: The planar monocyclic conjugated system will be aromatic in character if it contains…

Q: Would ice still float if water molecules in ice occupied the same space as water molecules in liquid…

A: Density is defined as the mass per unit volume, it has the units of kg/m3. Generally, less-density…

Q: Which parts of Earth are most similar to the plate with an axis angle of 0°? Explain.

A:

Q: oes the graph say about an increase in sea level rise because of melted flo

A: When ice melts from the glaciers and floats in the water streams, it leads to an increase in sea…

Q: A 50 wt% Pb-50 wt% Mg alloy is slowly cooled from 700°C (1290°F) to 400°C (750°F). (i) At what…

A: The Mg-Pb phase diagram is shown as follows:

Q: What is the coefficient the should be placed in front of phosphorus (P4)? * F2+ P4- PF3 Choose What…

A: The chemical reaction follows the law of conservation of mass. According to the law of conservation…

Q: A 10.60 g organic acid (1.45% dissociated) is dissolved in 2.5 kg water and freezes at -0.043°C. 27.…

A: We know that ∆Tf = Kf×m×i  And  ∆Tb= Kb×m×i

Q: Ice floats on water because it has a higher density than water due to its honeycomb structure. O…

A:

Q: To test Döbereiner’s idea , predict:(a) The boiling point of HBr from the boiling points of…

A: a.

Q: rounded the answer to 2 decimal places Calculate 0rot for Dioxygen (02) given that the O - 0…

A: Introduction: Rotational spectroscopy measures the energies of transition between quantized…

Q: Methane burns and give off 192 Kcal/Mol, assuming 90% effeciency in heat transfer. what mass in KG…

A: Answer: In the process of heating up ice, there will be three steps,  1. Heating of ice up to its…

Q: Critical point 22,089 Water Ice (liquid) (solid) 101 Triple point 0.6 B. Water vapor I (gas) A…

A: A phase transition is defined as transition from one state of matter (solid, liquid and gas) to…

Q: Examining the crystal structure of CsCl (Caesium Chloride), the Cs+ions form the 8 corners of a cube…

A: The crystal structure of CsCl is given to have Cs+ ions present at the eight corner of the cube…

Q: Consider the data in the table. Compound Melting point (°C) AHfus (kJ/mol) Boiling point (°C) AH,p…

A: When a compound experiences a change of state, the Gibbs free energy becomes zero and entropy is…

Q: Thermodynamics and enthalpy Data: M(Pb) = 207 g mol AmeltH°(Pb) = 4.8 kJ-mol AvapH°(Pb) = 179.5…

A: Molar enthalpy of reaction can be calculated from the steps involved in the reaction.

Q: 4. Sodium forms a body centered cubic crystal. Calculate the density of sodium metal. Propose a…

A: In a body centered cubic crystal: Body diagonal=4r where r is atomic radius of atom Density=ZMa3NA…

Q: I need help with question number 1

A: London Dispersion Forces: Weak intermolecular forces due to the formation of dipoles between…

Q: TRUE of FALSE? Q: What is the bond angle in a water molecule? A: 120-

A: In water molecule  center atom is oxygen  Oxygen atom participate in SP3 hybridisation

Q: 40 Boyle's, law 35 30 25 15 02 0-4 Dete 8 What is the sShape of the deta 2inear Yes.

A: In this question we will define Boyle's law and plot the respective graph. We will tell the shape of…

Q: Explain why Mg experiences a greater Zeff than does P.

A: Effective nuclear charge can be calculated using Slater's rule.

Q: Find w for the evaporation of 471 g of water at this temperature. The heat of vaporization of water…

A: HV=40.7 kJ/mole T=373K Mass of water = 471g W=?

Q: 100. Draw ionic Lewis structures for KF and CaC. Use the in- formation and the method in the…

A: The ionic Lewis structures are - For KF  K˙ + ⋮ F˙⋮  →K+ ⋮F¨⋮- = K+F- For CaO Ca: + :O :¨…

Q: 80 .D Solid 34 Pressure, bar Liquid 1.013 A Gas 0.13 VB 63 77 122 126 Temperature, K 48. The…

A: In the given question, the mentioned phase diagram explain in detail the behaviour of the substance…

Q: parta) Which of the tollowing radius? AK BS C) Ar has the smalest

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: Using Hess's Law calculate Koverall 4 NH3 ( +5 02 ( 4 NO () + 6 H2O () Koverall 2 NO () K 0.25 i) N2…

A: At equilibrium, the rate of the forward and the reverse reaction is the same and the concentration…

Q: Can i get a picture of the pireyodic table

A: Following is the picture of the Morden periodic table.

Q: In the future, metals may be discovered that are even softer than very soft metals such as Au or Hg.…

A: The HSAB principle put forward by Pearson states that, soft acids react faster and form stronger…