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JAMB Chemistry 2014 Paper

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Question : 10

Total: 45

A silicon -containing ore has 92% 28Si, 5% 29Si and 3% 30Si. Calculate the relative atomic mass of the silicon.

14.00
29.00
28.11
28.00

Solution:

( $\frac{92}{100}$ x 28) + ( $\frac{5}{100}$ x 29) + ( $\frac{3}{100}$ x 30) = 28.11

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