Question

the image shows a lewis structure for a dimethylhydrazine, and a space shuttle. dimethylhydrazine is an example of a hypergolic propellant, which are used as rocket fuels. their main use is for maneuvering, for example, in the space shuttle. they have molecular structures that contain high chemical potential energy that is released when mixed with an oxidizing chemical, usually nitrogen tetroxide. what are the angles of the n - n - c bond, (indicated as a) and the h - c - h bond (indicated as b)? a - 120° and b - 109° a - 109° and b - 120° a - 109° and b - 109° a - 120° and b - 109° dont test me yet, i am trying to gain an understanding before attempting to answer this question.

Explanation:

Step1: Analyze N - N - C bond (A)

The N - N - C bond has nitrogen with a non - bonding pair of electrons. Nitrogen is sp3 hybridized around the central nitrogen atom in the N - N bond region. The presence of the non - bonding pair causes the bond angle to be less than the ideal tetrahedral angle. The angle is approximately 109°.

Step2: Analyze H - C - H bond (B)

The carbon atom in the H - C - H bond is sp3 hybridized. For an sp3 hybridized carbon atom in a non - strained environment, the bond angle is approximately 109°.

Answer:

A - 109° and B - 109°