Chemistry
JAMB 1987
An element Z, contained 90% of
168Z and 10% of Z
1818 its relative atomic mass is?
-
A.
16.0
-
B.
16.2
-
C.
17.0
-
D.
17.8
Correct Answer: Option B
Explanation
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
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