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An element Z contains 80% of $^{16} _8$ Z and 20% of \(^{18...

An element Z contains 80% of $^{16} _8$ Z and 20% of $^{18} _8$ Z. Its relative atomic mass is

A.

16.2

B.

17.6

C.

16.0

D.

16.4

View answer & explanation

Correct answer is D

R.A.M of Z = $16(\frac{80}{100}) + 18(\frac{20}{100})$

= $12.8 + 3.6$

= 16.4

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