1) same amount of carbon atoms.
That is why it is still called butane and butene.
but- always signifies 4 carbons
Covalent bond is a type of chemical bond which is formed as a result of sharing of electron pairs among the elements that are involved. The structure of the covalent bond is affected by the electronegativity of the elements involved. The molecules joined by covalent bond range in size from very small to very large polymers. There are different types of structures for covalent substances, these include: macromolecular substances, molecular substances and giant covalent structures. Strong bonds hold individual molecules together but there are negligible forces of attraction among them.
The answer is a. products and reactants are equally favored in the reaction. The Keq is a ratio of reactants and products. So if it >1, it means favoring products and it < 1 means favoring reactants.