La ratio molar es el factor de conversión que se utiliza cuando se convierte de moles de una sustancia a moles de otra sustancia diferente

i'm assuming that the correct answer is indeed the first one/ "a"..

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water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

answer seismograph;