Mass of copper in 1 peso coin : 4.125 grFurther explanationThe concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm), or mole fraction.Percent mass of the component shows the total mass of the component in the overall mass of a compound / mixtureA 1 peso coin has a mass of 5.5 grams1 peso coin containing 75% copper by massSo the mass of copper:mass of copper=mass of coppermass of peso coin75%=mass of copper5.5 grmass of copper=75%×5.5mass of copper=4.125 grmass of copper= mass of peso coinmass of copper 75%= 5.5 grmass of copper mass of copper=75%×5.5mass of copper= 4.125 gr