Compare the molecules

H2NNH2 and HNNH. Which molecule has the
stronger N-N bond?

I suspect that HNNH has a double N=N bond, which would be stronger.

But my Chemistry is as bad as my Spanish

find the mass percent of CuSO4 in a solution whose density is 1.30 g/ml and whose molarity is 1.36 M

To compare the strength of the N-N bonds in H2NNH2 and HNNH, we need to consider the molecular structure and the bonding differences between the two molecules.

H2NNH2 is known as hydrazine, and it has a structure where two nitrogen atoms are connected by a single bond, and each nitrogen atom is also bonded to two hydrogen atoms.

HNNH is known as diazene. It has a structure where two nitrogen atoms are connected by a double bond, and each nitrogen atom is also bonded to one hydrogen atom.

The strength of a bond is determined by factors like bond length and bond energy. Generally, a shorter bond length indicates a stronger bond, and a higher bond energy is associated with a stronger bond.

In the case of H2NNH2, the N-N bond is a single bond, which tends to be longer and weaker compared to a double bond. Therefore, the N-N bond in H2NNH2 is weaker than the one in HNNH.

In HNNH, the N-N bond is a double bond, which tends to be shorter and stronger compared to a single bond. Therefore, the N-N bond in HNNH is stronger than the one in H2NNH2.

So, in conclusion, HNNH has a stronger N-N bond compared to H2NNH2.

Some teachers may not realize that quimica is Spanish for chemistry.