In the final answer of the expression

Some Basic Concepts of Chemistry

\frac{( 2 9 . 2 - 2 0 . 2 ) ( 1 . 7 9 \times 1 0 ^{5} )}{1 . 3 7}

the number of significant figures is :

On calculation we find

\frac{( 2 9 . 2 - 2 0 . 2 ) ( 1 . 7 9 \times 1 0 ^{5} )}{1 . 3 7}

= 1.17×10

^{6}

As the least precise number contains 3 significant figures therefore answers should also contains 3 significant figures.

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