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Calculate the molecular masses of the fo...

Calculate the molecular masses of the following :
(a) Hydrogen, `H_(2)` , (b) Oxygen, `O_(2)`, (c) Chlorine, `Cl_(2)` , (d) Ammonia, `NH_(3)` , (e) Carbon dioxide, `CO_(2)`
(Atomic masses : `H = 1 u, O = 16 u , Cl = 35.5 u , N = 14 u , C = 12 u`)

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(a) `2 u` , (b) `32 u` , (c ) `71 u` , (d) `17 u` , (e ) `44 u`,
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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. What is the significance of the formula H(2)O ?

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  2. The molecular formula of glucose is C(6)H(12)O(6). Calculate its molec...

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  3. Calculate the molecular masses of the following : (a) Hydrogen, H(2)...

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  4. Calculate the molecular masses of the following compounds : (a) Met...

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  5. Calculate the molecular masses of the following compounds : (a) Me...

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  6. Calculate the molecular mass of ethanoic acid, CH(3)COOH. (Atomic ma...

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  7. Calculate the molecular mass of nitric acid, HNO(3). (Atomic masses : ...

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  8. Calculate the molecular mass of chloroform (CHCl(3)). (Atomic masses...

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  9. Calculate the molecular mass of hydrogen bromide (HBr). (Atomic masses...

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  10. Calculate the molecular masses of the following compounds : (a) Hy...

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  11. State the law of conservation of mass. Give one example to illustrate...

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  12. State the law of constant proportions. Give one example to illustrate ...

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  13. (a) State the various postulates of Dalton's atomic theory of matter...

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  14. (a) What is the significance of the symbol of an element ? Explain w...

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  15. (a) What is an atom ? How do atoms usually exist ? (b) What i...

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  16. (a) Define atomic mass unit. What is its symbol ? (b) Define atomic...

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  17. The atomicites of ozone, sulphur, phosphorus and argon are respectivel...

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  18. The symbol of a metal element which is used in making thermometers is ...

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  19. The Latin language name of an element is natrium. The English name of...

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  20. The atomic theory of matter was proposed by :

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