Molecular Mass Of Polymers

The reaction between M CO and HCl is: From the principle of atomic conservation, 1 mole of M CO produces 1 mole of CO . Given: The mass of M CO is 1 g, so:

Final Answer: .

Hydrogen Bonding in Ice Crystal Structure

In an ice crystal, each water molecule forms four hydrogen bonds with its neighboring water molecules.

A water molecule (H2O) has two hydrogen atoms and one oxygen atom. The oxygen atom is more electronegative than hydrogen, creating a polar molecule with a partial negative charge on the oxygen and partial positive charges on the hydrogens.

Each water molecule can act as a hydrogen bond donor through its two hydrogen atoms. The slightly positive hydrogen atoms can interact with the slightly negative oxygen atoms of neighboring water molecules, forming two hydrogen bonds.

Additionally, each water molecule can act as a hydrogen bond acceptor through its two lone pairs of electrons on the oxygen atom. These lone pairs can interact with the slightly positive hydrogen atoms of two other neighboring water molecules, forming two more hydrogen bonds.

Conclusion:

Thus, each water molecule in ice participates in a total of four hydrogen bonds: two as a donor and two as an acceptor, creating a tetrahedral network structure.

Gabriel Phthalimide Synthesis Isomer Count 

The Gabriel phthalimide synthesis is used to prepare primary amines (R-NH2). Since the question asks for aromatic amines with the formula C8H11N, we need to consider isomeric primary aromatic amines.

The degree of unsaturation (DU) for C8H11N is:

A DU of 4 suggests the presence of a benzene ring (DU = 4). This leaves us with C2H5 to account for. Since the Gabriel synthesis produces primary amines, the nitrogen must be attached to one of these carbons.

The possible isomers are:

Other dimethylanilines (like 3,4-dimethylaniline) are identical to the ones listed above. 2,6-dimethylaniline is the same as 2,3-dimethylaniline.

Conclusion:

Therefore, there are 6 possible isomeric aromatic amines that can be synthesized by Gabriel phthalimide synthesis.

The balanced reaction between KMnO and ferrous ammonium sulfate in the presence of H SO is:
This equation shows that for every 2 molecules of KMnO , 8 molecules of water are produced. Thus, for 2 molecules of KMnO , the total number of water molecules produced is:

Solution:
The given reaction is: The bond enthalpy change for this reaction is given as . Let the bond enthalpies of , , and be , , and respectively. We are told that the bond enthalpies are in the ratio: Now, applying the concept of bond enthalpy for the reaction: The bonds broken are the bonds in and , and the bonds formed are the bonds in . Hence, we have: Substitute and into the equation: We are given that , so: Finally, since , the bond enthalpy of is: Thus, the bond enthalpy of is -400 kJ/mol.

The osmotic pressure ( ) for a solution is given by the formula:
where:

is the number of moles of solute,

is the gas constant,

is the temperature,

is the volume of the solution.

For non-electrolyte (A) and glucose, the osmotic pressures are the same, so we can equate the osmotic pressures: where is the molar mass of A, and 12 g is the mass of A. Simplifying the equation: Thus, the molecular mass of A is 240 g/mol.