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What is molecular weight ?...

What is molecular weight ?

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The red colour of blood is due to a compound called "haemoglobin". It contains 0.335 % of iron. Four atoms of iron are present in one molecule of haemoglobin. What is its molecular weight? (At. mass : Fe 55.84)

Calculate the average molecular kinetic energy : per kg molecule of oxygen at 127 ∘ C, given that the molecular weight of oxygen is 32, R = 8.31 J m o l ^ -1 K − 1 , and Avogadros number N A ​ is 6.02×10 23 molecules mol −1 .

The vapour pressure of water at 20^(@)C is 17.54 mm . When 20 g of a non-ionic , substance in dissolved by 0.30 mm . What is the molecular weight of the substance ?

Empirical formula of compound is CH_(2)O .If its molecular weight is 180 then the molecular formula of the compound is

Proteins are high molecular weight polymers mainly containing the elements______.

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The relation between molar specific heat, molecular weight and principal specific heat is (Wlieie symbols have Iheii usual meaning)

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CHETANA PUBLICATION- SOME BASIC CONCEPTS OF CHEMISTRY-EXERCISE
  1. What is molecular weight ?

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  2. Calculate the volume of hydrogen required for hydrogenation of 0.60 dm...

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  3. Calculate the no. of moles in 6 xx 10^21 NH3, 5 XX10 ^21 C atoms and...

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  4. Calculate the no. of moles in 1.6xx10^-2 kg of SO2, 5g of CaCO2 and 1...

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  5. Calculate the no. of moles present in 0.0056 m^3 of Ar and 224 cm^3 of...

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  6. A signature made by graphite pencil is of weight 2 xx 10^-3 g . Calcu...

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  7. Calculate the volume of oxygen required for the complete combustion of...

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  8. A sample of pure water , whatever the source always contains……………… by ...

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  9. Which of the following compounds can NOT demonstrate the law of multip...

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  10. Which of the following temperature will read the same value on Celsius...

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  11. SI unit of the quantity electric current is ………………

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  12. In reaction N 2 + 3H2 rarr 2NH3 the ratio by volume ofN2 , H2 and NH...

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  13. Which of the following has maximum number of molecules ?

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  14. How many g of H2 O are present in 0.25 mol of it ?

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  15. The number of molecules in 22.4 cm^3 of nitrogen gas at STP is

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  16. Which of the following has the largest number of atoms ?

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  17. A sample of pure water , whatever the source always contains……………… by ...

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  18. The number of molecules in 22.4 cm^3 of nitrogen gas at STP is

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  19. In reaction N 2 + 3H2 rarr 2NH3 the ratio by volume ofN2 , H2 and NH...

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  20. The temperature at absolute zero is.

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  21. Define the term unit .

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