Which is proof that in any synthesis reaction, a chemical change has occurred?

in a synthesis reaction, two reactants combine to form a new compound.

many synthesis reactions involve a phase change.

in a synthesis reaction, oxygen is always converted to carbon dioxide.

all synthesis reactions are exothermic.

Option (a) is the correct answer.

Explanation:

A chemical reaction is a reaction in which there is formation of new compounds due to change in chemical composition of the reactants during the reaction.

For example,

Therefore, we can conclude that a proof that in any synthesis reaction, a chemical change has occurred because in a synthesis reaction, two reactants combine to form a new compound.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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