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Why are the atomic masses generally frac...

Why are the atomic masses generally fractional?

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CHHAYA PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-WARM UP EXERCISE
  1. What do you mean by 'the mass of an H-atom is 1.008 amu'. Calculate th...

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  2. Distinguish between actual mass and atomic mass.

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  3. Why are the atomic masses generally fractional?

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

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  5. What is the magnitude of 1 amu?

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

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  7. Define molecular mass according to modern scale.

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

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

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  10. Define formula mass.

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

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  12. 1g mole oxygen=2 gram-atom oxygen'-justify.

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

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  14. Which one is the volume of 1g of oxygen gas at STP? (i) 0.7 L (ii)...

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  15. Is the statement correct or incorrect- 35.5g of chlorine contains 6.02...

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  16. Calculate the number of molecules in 0.52g of acetylene.

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  17. Find the number of molecules in 1 millimole of CO(2).

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  18. Calculate the number of O-atoms in 0.5 mol of SO(2).

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  19. Calculate the mass of 1 mol of electrons if the mass of one electron b...

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  20. At a temperature of 273K and 1 atm pressure 1L of a gas weighs 2.054g....

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