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Obtain the moles of substances in the fo...

Obtain the moles of substances in the following.
a. 3.43 g of C b. 7.05 g `Br_2`
c. 76 g `C_4H_(10)` d. 35.4 g `Li_2 CO_3`
e. 2.57 g As f. 7.83 g `P_4`
`41.4 g N_2H_4` h. 153 g `Al_2(SO_4)_3`

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NCERT TAMIL-CHEMICAL CALCULATION -Problems of Practice
  1. CS2 is a colourless, highly inflammable liquid used in the manufacture...

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  2. Nitric acid, HNO3 is a colourless, corrosive liquid used in the manufa...

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  3. Obtain the moles of substances in the following. a. 3.43 g of C b...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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