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Calculate the following Number of mole...

Calculate the following
Number of molecules in 43 g `NH_3`

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NCERT TAMIL-CHEMICAL CALCULATION -Problems of Practice
  1. Obtain the moles of substances in the following. a. 3.43 g of C b...

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  2. How many molecules are there in 56 mg HCN ?

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  3. Calculate the following Number of molecules in 43 g NH3

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  4. Calculate the following Number of atoms in 7.46 g Li

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  5. Calculate the following Number of atoms in 7.46 g Li

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  6. A substance on analysis, gave the following percentage composition, Na...

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  7. What is the simplest formula of the compound which has the following p...

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  8. A compound on analysis gave the following percentage composition C = 5...

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  9. An organic compound was found to have contained carbon = 40.65%, hydro...

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  10. A compound contains 32% carbon, 4% hydrogen and rest oxygen. Its vapou...

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  11. An acid of molecular mass 104 contains 34.6% carbon, 3.85% hydrogen an...

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  12. What is the simplest formula of the compound which has the following p...

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  13. Calculate the oxidation number of underlined elements in the following...

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  14. Calculate the oxidation number of underlined elements in the following...

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  15. Calculate the oxidation number of underlined elements in the following...

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  16. Calculate the oxidation number of underlined elements in the following...

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  17. Calculate the oxidation number of underlined elements in the following...

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  18. Balance the equations Cr^(3+) + Na2O2 to CrO4^(-) + Na^(+)

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  19. Balance the equations S^(2-) + NO3^(-) to NO + S

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  20. Balance the equations FeS + O2 to Fe2O3 + SO2 ( molecular form )

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