Which statement best describes a mole? it is used mainly for writing chemical formulas. it is used for chemical equations that have reversible reactions. it is used for directly comparing the amounts of substances. it is used mainly for dealing with fluid substances.

The correct option is this: IT IS USED FOR DIRECTLY COMPARING THE AMOUNTS OF SUBSTANCES.

In chemistry, a mole is defined as the quantity of sample of a chemical substance that contain as many as many particles as there are in 12 grams of carbon 12. Mole is the SI unit of measurement for amount of substances. In chemistry, mole is used to represent the amount of reactants and products in chemical equations.

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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