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Some Basic Concepts of Chemistry

Question

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Define the term significant figures.

Solution

Significant figures are meaningful digits which are known with certainty.

Question

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What is the number of significant figures in 0.0026?

Solution

Two

Question

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What is the number of significant figures in 9.984?

Solution

Four

Question

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Express the Avogadro's number (6·023×10²³) upto three significant figures.

Solution

6·02×10²³.

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