An element Z, contained 90% of 168Z and 10% of Z1818 its relative atomic mass is?
- 16.0
-
16.2
- 17.0
- 17.8
The correct answer is: B
Explanation
Mass number of Z = 16 while that of Z is 1890 x 16 = 14.4 10 x 18 = 1.8
100 1 100 1
it relative atomic mass = 14.4 + 1.8 = 162