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Balance the equations Cr^(3+) + Na2O2 to...

Balance the equations `Cr^(3+) + Na_2O_2 to CrO_4^(-) + Na^(+)`

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NCERT GUJARATI-CHEMICAL CALCULATION -Problems of Practice
  1. A compound contains 32% carbon, 4% hydrogen and rest oxygen. Its vapou...

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

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

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

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

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

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

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

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  9. Balance the equations Mg + NO3^(-) to Mg^(2+) + N2O + H2O) ( in acidi...

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

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  11. Balance the equation S^(2-) + NO3^(-) to NO + S8

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

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  13. Balance the equations Cl2 + OH^(-) to Cl^(-) + ClO3^(-) + H2O

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  14. Calculate the volume of 14.3 M NH3, solution needed to prepare 1L of 0...

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  15. How would you make up 425 mL of 0.150M HNO3 from 68.0% HNO3? The densi...

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  16. Calculate the molarity of a solution obtained by mixing 100 mL of 0.3 ...

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  17. Calculate the molality of a solution by dissolving 0.850g of ammonia (...

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  18. NiSO4 reacts with Na3PO4 to give a yellow green precipitate of Ni3 (PO...

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  19. What volume of 0.250 M HNO3 reacts with 42.4 mL of 0.150 M Na2CO3 in t...

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  20. A flask contains 53.1 mL of 0.0150 M Ca(OH)2 solution. How many mL of ...

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