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How many atoms and molecules are presen...

How many atoms and molecules are present in 1.24 gm of phosphorus (P4)

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CBSE COMPLEMENTARY MATERIAL-SOME BASIC CONCEPTS OF CHEMISTRY -2-MARKS QUESTIONS
  1. Hydrogen peroxide and water contain 5.93% and 11.2 % of hydrogen respe...

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  2. The density (in g mL^(-1)) of a 3.60M sulphuric acid solution that is ...

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  3. The cost of table salt ( NaCl ) is Rs. 10 per Kg. calculate its cost ...

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  4. Calculate the mole fraction of the solute in a 1.00 molal aqueous sol...

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  5. Dissolving 120g of urea (mol wt = 60) in 1000g of water gave a solutio...

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  6. Calculate the percentage of N in urea. (Molar mass of urea = 60" g mo...

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  7. 25 mL of 3.0 M HCl are mixed with 75 mL of 4.0 M HCl. If the volumes a...

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  8. How many atoms and molecules are present in 1.24 gm of phosphorus (...

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  9. 45.4L of dinitrogen reacted with 22.7L of dioxygen and 45.4 L of nitro...

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  10. Give one example each of a molecule in which the empirical and molecul...

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  11. Calculate the number of moles in the following masses : (i) 7.85g o...

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  12. Calculate the percent of carbon, hydrogen and oxygen in ethanol (C(2)H...

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  13. How much copper can be obtained from 100 g of CuSO(4) ?

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  14. Calculate the amount of water (g) produced by the combustion of 16 g o...

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  15. How many moles of methane are required to produce 22 g CO(2) (g) after...

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  16. A solution is prepared by adding 2 g of a substance A to 18 g of water...

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  17. Calculate molarity of water if its density is 1.00 g mL^(-1).

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  18. Calculate the molarity of NaOH in the solution prepared by dissolving ...

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  19. The density of 3 M solution of NaCl is 1.25 "g mL"^(-1). Calculate mol...

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  20. NH(3) gas can be prepared by Haber’s process as, N(2)(g) + 3H(2) (g) ...

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