Which formulas represent compounds that are isomers of each other? h hh-c-h and h c-hh h2 ho-c-h and h c-ohh hh-c-c-c oh and h-c o-c-c-hh hh h hoh hh oh h4 h-c-c-c-h and h c c-hh h

Answer : The correct option is, (3)

Explanation :

Isomers : It is defined as the molecule that has the same chemical formula but  it has the different structures.

Same chemical formula means that the same number of elements are present in both the compounds.

In option 1,2 and 4, both chemical formula and the structure are different. So, the option 1 compounds are not the isomers of each other.

In option 3, the chemical formula is same but the structure are different. So, the option 3 compounds are the isomers of each other.

Hence, the correct option is, (3)

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.