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When do zeros present in a number become...

When do zeros present in a number become insignificant ?

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The zeroes written to the left of the first non-zero digit in a number are insignificant. For example, in the number 0.014, both the zeros are insignigicant.
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DINESH PUBLICATION-MOLE CONCEPT-Concept Based Question
  1. When do zeros present in a number become insignificant ?

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  2. Is velocity a basic or derived quantity according to S.I system ?

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  3. Which is more precise measurement of the length of a thread (i) 10.0 c...

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  4. Why do we regard the gaseous state of water as vapours while that of a...

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  5. Why is distilled water a compound while tap water a mixture ?

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  6. Mixture of salt and water is a solution while that of oil and water is...

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  7. When is the law of definite proportions not obeyed ?

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  8. Which law co-relates the mass and volume of a gas ?

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  9. Atomic mass of oxygen is 16 u. What does it indicant ?

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  10. An element has fractional atomic mass. What does it indicate ?

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  11. What is the difference between the mass of a molecule and molecular ma...

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  12. Where do we use the words mole and mol ?

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  13. Does one gram mole of a gas occupy 22.4 L under all conditions of temp...

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  14. What is the basic difference between empirical and molecular formulae ...

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  15. The percentages of all the elements present in a compound are 92. What...

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  16. Whay is it necessary to balance a chemical equation ?

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  17. In the combustion of methane, why is methane regarded s the limiting r...

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  18. Distinguish between molarity and molality.

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  19. Is the number of molecules in one mole of a gas at 100^(@)C and 500 m...

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  20. Are 0.5 mole of NaOH and 0.5 M of NaOH solution same ?

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