Draw the structure of a molecule which contains only carbon and hydrogen atoms (only three of which are carbon) and in which two of the carbons are sp2 hybridized and the other is sp hybridized.

CH₂ = C = CH₂

Explanation:

Hybridization is the mixing and blending of two or more pure atomic orbitals (s, p and d) to form two or more hybrid atomic orbitals that are identical in shape and energy e.d sp, sp², sp³, sp³d, sp³d² etc.

The structure of the organic molecule that contains only carbon and hydrogen atoms where there exist only three of which are carbon and in which two of the carbons are sp2 hybridized and the other is sp hybridized can be seen below.

CH₂ = C = CH₂                  ( where the = sign represent the double bonds)

Here, The two carbons that are sp₂ hybridized are CH₂

the other carbon that is sp hybdrized is C

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.