The element europium exists in nature as two isotopes: Eu-151 has a mass of 150.9209 amu, and Eu-153 has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu. Calculate the relative abundance of the two europium isotopes.(x/100)(150.9209) + (y/100)(152.9209) = 151.96
(x)1.5092 + (y)1.5292 = 151.96(x+y)1.0133 = 151.96