The forces measured by AFM arise primarily from interactions between electrons of the tip and on the surface. To get an idea of the magnitudes of these forces, calculate the force acting between two electrons separated by 2.0 nm. To calculate the force between the electrons, use F = −dV/dr where V is their mutual Coulombic potential energy and r is their separation.

Q: 2 HAHB Two water molecules are separated by 2.72 Å in air. Use the equation V = - to calculate the…

A:

Q: The viscosities of five liquids at 25°C are given in the following table. Explain the observed…

A: Following factors affects the viscousity of a liquid .

Q: calculate the ionic attractive energy between K and O ions per mol of the material.

A: Between  K+ and O2-  ionic bond is formed. Ionic bonds are formed when positively and negatively…

Q: 5 if the viscosity of Nacl = 664.256 mpa.s viscosity of NaOH= 1.00979 cp viscosity of water= 0.6531…

A: We have to calculate the viscosity of the entire mixture. The given data is:\ Viscosity of NaCl=…

Q: Calculate the van der Waals radius for two atoms (in picometers) whose centers are separated by 428…

A: • The values provided in the question are:-    i) Distance between centers of two atoms, d = 428 pm…

Q: What is surface tension, and what conditions must existfor it to occur?

A: Surface tension is a characteristic property of the liquid which arises due to the fact that…

Q: B. The contact angle for water on clean glass is close to zero. Calculate the surface tension of…

A: From the given date ,  The contact angle = 0  Cos (0) = 1 Temperature at °C = 30°C Height of water…

Q: Choose the substance with the greatest surface tension. C20H42 O CSH12 O C8H18 O C9H20

A: Surface tension of a compound is directly proportional to the intermolecular force present in the…

Q: Illustrate the Origin of surface tension ?

A: Surface tension is the property of a liquid that tends to occupy the smallest surface area. Like…

Q: Which equation represents condensation? a) 12(s) → 12(g) b) 12(s) → 12(g) c) 12(g) - 12(() d) 12(s)…

A: (C) 12(g) → 12(l)

Q: Higher viscosity. H3C-(CH2)8-CH3 53 H3C-(CH2)4-CH3 Better solvent for NaCl. Hexane , μ = 0.00 54…

A:

Q: Q1. Differentiate between dispersion forces and dipole-dipole interactions with reference to…

A: In this question, we have to find out the correct answer of given problem by the help of CONCEPT OF…

Q: Define the term s surface tension?

A: Surface tension is one of the most important physical properties of fluids. This determines the…

Q: Which molecule has the highest surface tension

A: Surface tension mainly depends on the intermolecular force of attraction.

Q: Which of the following compounds has the highest viscosity? a) CH3-(CH2)25-CH3(1) b)…

A: 1) more the intermolecular forces of attraction, more the viscosity.

Q: The surface tension and viscosity of water at several different temperatures are given in this…

A: Given data table depicts the changes in surface tension and viscosity of water at various…

Q: ln(0.72)= (delta H vap )/(62.37L mmHg/mol K)(-0.00047) Find delta H vap

A:

Q: 7. At 25" C, water rises through 7.36 cm in a capillary of radius 0.20 mm. Calculate its surface…

A: Given: At 25°C water rises through 7.36 cm  Radius: 0.20 mm Density of water : 0.9971 To find:…

Q: Explain why water alone cannot be used to remove grease from a surface

A: Water & grease can't mix with each other due to hydrophobic (water heating)properly of grease…

Q: Determine the sublimation point (in C) for 12 (s) 1, (g)

A: Let the reaction be- Solid↔Gas Therefore, ∆Ssub=∆HsubTsub where ΔSsub: Standard Entropy of…

Q: Surface energy and surface tension are equivalent quantities. Surface energy values are typically…

A: Surface tension is the surface energy per unit area , So surface energy and surface tension is…

Q: What amount of energy is required to change a spherical drop of water with a diameter of 2.00 mm to…

A: The radius (R) of big droplet is half of the diameter (D) of the big droplet. Thus, the radius is…

Q: Define hydrogen bonding ?

A: Hydrogen bonding is observed in the molecule having hydrogen atom that is attached to the more…

Q: Polarizability is defined as the extent to which the electron cloud surrounding an atom or molecule…

A: The polarizability of the given molecules depends  upon the charge and size of the atom:

Q: which of the following would have the highest viscosity at a temperature and pressure where all are…

A: The viscosity of the any liquid is proportional to the strength of molecular interactions between…

Q: Define the following terms: a. salt bridges b. ionic interactions c. van der Waals forces d.…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: Q5/ If the radius of the capillary tube is r = 0,033 cm and when dipped in a %3D liquid its density…

A: The answer is 0.028 N/M

Q: 3. Compare the melting points of the following molecules and explain the reason: LiF, NaF, EsF. Bo…

A: The order of melting point is in the order :- LiF > NaF > CsF Reason :- The anion is same in…

Q: The magnitude of the electric force between two particles depends on which factors?

A: For the electric force between two stationary charged paricle, Coulomb formulate an equation which…

Q: Put the following compounds in order of decreasing viscosity (1 is the highest and 4 is the lowest).…

A: Larger the intramolecular forces, larger will be the viscosity.

Q: rends. Compound 1 has the lowest surface tension, 4 has the highest surface ension. SO3 HF CO2 CH20…

A: As the intermolecular force of attraction increase boiling point increase and surface tension…

Q: what is meant by the term polarizability?

A: Polarization means separation of charges. So, as the name suggests, the polarizability is the…

Q: 2. Calculate the amount of heat energy associated with 255 g of water vapor condensing at 10°C.

A:

Q: 54. Butanol and pentane have approximately the same molar mass. However, the viscosity at 20 C of…

A: Butanol and pentane have approximately the same molar mass. However, the viscosity at 20oC of…

Q: Which intermolecular force correlates with polarizability?

A: Polarizability generally refers to the tendency of matter, when exposed to an electrical field, to…

Q: In which phase are water molecules least able to have rotational motion?

A: In solid phase the water molecules least able to have rotational motion. Where as in vapor phase…

Q: Which of the following statements is true about surface tension? * Surface tension is responsible…

A: Option a is correct .

Q: Which of the following straight chain hydrocarbons will have the highest viscosity at 298K? C5H12…

A: Form above given hydrocarbons which is having highest viscosity :

Q: Dipole-dipole force can not be found in CO2 O2 O NH3 о со

A: Dipole - dipole force can not be found in ?

Q: - Explain the following trends in surface tension in terms of intra-molecular and intermolecular…

A:

Q: Determine the attractive forces that exist in: a) AlF3 b) CH3F c) C

A: The substances given are AlF3, CH3F and C.

Q: (a) What is the relationship between surface tension andtemperature? (b) What is the relationship…

A: a) In general, the surface tension of molecules is inversely proportional to the temperature i.e it…

Q: ethylene glycol are shown here. Surface Tension Viscosity (mPa s) Compound Molecule (mN/m) diethyl…

A: The question is based on the concept of viscosity. the values of viscosity have been assigned. we…

Q: 12.Which equation represents condensation? a) 12(s) → 12(g) b) 12(!) → 12(g) c) 12(g) - 12(() d)…

A: Condensation is just reverse of evaporation in which gas turns to liquid state.

Q: List all types of intermolecular forces that exist between particles in each of the following pure…

A:

Crystallography

Crystallography is the category of science that focuses on the atomic and molecular arrangements with their bonding constituting the crystal structure. It is derived experimentally and originated in the year 1912. It is a combination of two words; those are crystal, meaning a cold drop, and graph, meaning writing.