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What was the reason for selecting oxygen...

What was the reason for selecting oxygen, instead of hydrogen, as the standard for defining atomic mass?

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CHHAYA PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-WARM UP EXERCISE
  1. Define a molecule on the basis of Avogadro's hypothesis.

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  2. Define atomic mass according to modern scale.

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  3. What was the reason for selecting oxygen, instead of hydrogen, as the ...

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  4. What is atomic mass unit?

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  5. Mention actual mass of a ""^(12)C-atom.

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  6. Mention the mass of ""^(14)N-atom in amu.

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  7. Atomic mass o an element should properly be called average atomic mass...

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  8. What do you mean by 'the mass of an H-atom is 1.008 amu'. Calculate th...

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  9. Distinguish between actual mass and atomic mass.

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  10. Why are the atomic masses generally fractional?

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  11. The element, boron has two isotopes (""^(10)B and ""^(11)B). Calculate...

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  12. What is the magnitude of 1 amu?

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  13. Calculate the number of gram-atom present in 2.1g of nitrogne and 0.23...

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  14. Define molecular mass according to modern scale.

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  15. The molecular mass of sodium chloride is 58.5'. Comment on this statem...

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  16. Give an example of a tetra-atomic element and calculate its molecular ...

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  17. Define formula mass.

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  18. Molecular mass and formula mass are not always synonymous-explain.

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  19. 1g mole oxygen=2 gram-atom oxygen'-justify.

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  20. which one is the volume of 2.8g of ethylene gas at STP? (i) 2.24 L ...

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