If a bond were to form between 2 elements, which of the pairs shown would be held together by a nonpolar covalent bond? Hydrogen and hydrogen Lithium and chlorine Aluminum and oxygen Hydrogen and chlorine

Hydrogen and hydrogen

Explanation:

A nonpolar covalent bond is formed when there is little or no electro negativity difference between the two bonding atoms in a covalent bond. This implies that the shared electron of the covalent bond is placed at an equidistant position from the nuclei of the two bonding atoms.

A bond between hydrogen and hydrogen is a homonuclear covalent bond, there is no electro negativity difference between the bonding atoms hence the covalent bond formed will be nonpolar.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.