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How would you round off a given figure? ...

How would you round off a given figure? Explain with examples.

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    • ICSE-SOME BASIC CONCEPTS OF CHEMISTRY -SHORT ANSWER TYPE QUESTIONS
    1. How would you round off a given figure? Explain with examples.

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    2. What do you understand by the term 'significant figures'?

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    3. Elaborate the term compound atoms as used by Dalton

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    4. State and explain law of multiple proportions with a suitable example.

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    5. State the main postulates of Dalton's atomic theory

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    6. Why is the use of relative masses of atoms preferred over their actual...

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    7. What is the Avogadro's number ? What information does it provide ?

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    8. What is the significance of the word average in the definition of atom...

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    9. Why are the atomic masses of most of the elements not whole numbers ?

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    10. What does the chemical formula of an ionic compound represent ?

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    11. How is the mass of an element related to the number of atoms present i...

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    12. Which does have more atoms, 1.0 g of hydrogen or 1.0 g of oxygen ?

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    13. How is the molecular formula of a compound related to its empirical fo...

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    14. What do you understand by a balanced chemical equation ?

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    15. What are the conditions which must be followed by a chemical equation ...

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    16. What do you understand by stoichiometric coefficients ?

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    17. What do you understand by the term semimolar solution ?

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    18. How is mole related to the volume of a gaseous substance ?

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    19. When is the law of constant proportions not obeyed ?

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    20. Calculate the actual mass of a single molecule of benzene.

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