An element Z, contained 90% of 168Z and 10% of Z1818 its relative atomic mass is?

An element Z, contained 90% of 168Z and 10% of Z1818 its relative atomic mass is?

Answer Details

Mass number of Z = 16 while that of Z is 18
90 x 16 = 14.4 10 x 18 = 1.8
100 1 100 1
it relative atomic mass = 14.4 + 1.8 = 162