justifie n=2 i.e molecules of benzoic acid forms dimer in organic phase using modified nernst law of distribution
Hello,
The seperation coefficients of benzoic acid in partially miscible two phase mixtures of (methanol + cyclohexane) were measured at the temperature of 293.15, 303.15, and 313.15 K. The inventive outcome show that the benzoic acid is more soluble in methanol than in cyclohexane and thus it makes the seperation coefficients, defined as the ratio of the total molar concentration of benzoic acid in methanol phase to cyclohexane phase, be greater than unity.
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Which of the following has maximum number of molecules? * 7gmN2 2gm H2 8gmO2 20gmNO2
Hello student ,
Generally 1 mole of a substance contains Avogadro Number of molecules that is 6.022 × 10^23 therefore
- 28g of N2 = 1 mole = 6.022×10^23 molecules. Therefore 7g of N2 = 7/28 = 0.25 mole = 6.022× 10^23/4 = 1.505×10^23 molecules .
- 2g of H2 = 1 mole = 6.022×10^23 molecules
- 16g of O2 = 1 mole = 6.022×10^23 molecules Therefore 8g of O2 = 8/16=0.5mole = 6.022×10^23/2= 3.011×10^23 molecules.
- 46g of NO2 = 1mole=6.022×10^23 molecules Therefore 20g of NO2 = 20/46=0.434 moles = 6.022×10^23*0.434= 2.6×10^23 molecules
Thus 2g of H2 has the highest number of molecules among the given elements/compounds
How can a material at a certain temperature have all of its molecules at the same energy?
A material at a certain temperature does not have all of its particles at the same energy. In the basic definition of the word, "temperature" is the average random motional (kinetic) energy of the particles of a material. (Thermodynamics gives a broader definition to temperature, but we don't need this definition here.) Did you notice the word "average" in the basic definition? Just because we can assign a single number to the temperature of an object that is in thermal equilibrium does not mean that every atom of the material is moving with the same energy because of the nature of averaging. If the average height of everyone in the room is 5 feet 9 inches, this does not imply that everyone in the room is 5 feet 9 inches tall. Some people will be 6 feet tall while others will be 5 feet 6 inches tall. The average of a set of a values only gives us a general idea of the group as a whole and does not tell us about any individual in the group. In the same way, the atoms in a material are all moving at different speeds and with different energies, even when the material has a constant and uniform temperature. Some of the atoms are moving faster than the speed corresponding to the material's temperature and some of the atoms are moving slower. A few of the atoms are moving much faster than what is implied by the temperature.
What is the name for the flow of molecules in fluids from higher to lower temperature regions?
Is ----- chemistry everyday life ,polymers and bio molecules enough from NCERT for jee mains and sir which is easy to learn i have done polymers from rest others.:)
Hello candidate,
Chemistry in everyday life, polymers, and biomolecules are most important for the JEE Mains examination and the syllabus for from this chapter does not come very frequently in the JEE advanced examination. So, it's better that you focus on the JEE Mains examination perspective in order for preparing for the chapters people in depth question from the chapter are not expected very often as per previous year trends. So, NCERT class 11th and class 12th text books would be enough for solving most of the questio in previous year paper from these chapters.
Good Luck!!
cuso4^4.5H2o How many molecules are in a molecule
Hey student,
9 How many hydrogen bonded water molecules are associated in CuSO4. 5H2O ? Solution Only one water molecule, which is outside the coordination sphere, is hydrogen bonded. The other four molecules of water are coordinated with copper cation.
All the best student,
Hope this helps you.
what is The molecules? and how to work
Hi
A Molecule of a substance is defined as the smallest possible unit of a substance having all the physical and chemical properties of the substance. It is usually formed by two or more atoms coming togather to form a smallest identifiable unit
This molecule are formed when atoms come together to form chemical bonds which are generally formed by sharing or donating electrons between the atoms. There are different types of bondings like
Ionic
Covalent
Hydrogen bonds
Van der walls interactions
Hope this helps
tha number of independent modes of vibration in non- linear molecules N atoms
hello Zarikul hoque,
hope you are doing well now coming back to your question,
As we know that in general, a non-linear molecule with N atoms has 3N – 6 normal modes of vibration, but a linear molecule has 3N – 5 modes, because rotation about the molecular axis cannot be observed. A diatomic molecule has one normal mode of vibration, since it can only stretch or compress the single bond.
hope this will help you lot,
Thank you.