Which of the forces of molecular attraction is the weakest? a double covalent bond b single covalent bond c ionic bond d hydrogen bond?

Option (b) is the correct answer.

Explanation:

A covalent bond is formed by sharing of electrons between the combining atoms. When only one electron is shared between the combining atoms then it is known as a single covalent bond.

On the other hand, sharing of two electrons is known as double covalent bond.

Less energy is required to break a single covalent bond as compared to a double covalent bond, ionic and hydrogen bond.

An ionic bond is formed by transfer of electrons and it occurs between atoms with opposite charges. Therefore, it is a strong bond.

Whereas hydrogen atom attached to another compound will result in the formation of a hydrogen bond.

Thus, we can conclude that in single covalent bond the forces of molecular attraction is the weakest.

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2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !