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Henry thinks that a mole contains 6.023 ...

Henry thinks that a mole contains `6.023 xx 10^(24)` molecules. Hence the mass of Henry's mole of Nitrogen is 

A

2.8 g

B

28g

C

280 g

D

0.28g

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The correct Answer is:
C
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Avogadro's lasw states that under conditions of constant temp. and pressure equal volume of gases contain equal no. of particles. Experimental investigation shows that at one atmosphere pressure and a temperature of 273 k, one mole of any gas occupies a volume of which is very close to 22.4 lit. Therefore, the number of moles in any gas sample canbe found by comparing its volume at STP with 22.4 lit. If avagadro's number is 6xx10^(23) molecules then the mass of one atom of oxygen would be

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When we concept that one mole of a substance contains the same numbers of elementary entities or one mole of any other substance, we don’t actually need to know what that number is. Sometimes however we will need to work with the actual number of elementary entities in a mole of substance. This number is called Avogadro.s number. N_(A)=6.022137xx10^(23) molecules The unit mol^(-1) which we read as per mole signifies that a collection of N_(A) molecular level entities is equivalent to one mole at the macroscopic level. For example a mole of carbon contains 6.02xx10^(23) atoms of C. A mole of oxygen gas contains 6.02xx10^(23) molecules of O_(2) . The number of atoms present in 8 g of ozone is

AAKASH SERIES-STOICHIOMETRY-OBJECTIVE EXERCISE - 2
  1. The density of a gas at STP is 1.5 g/L. Its molecular weight is

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  2. 7g of nitrogen occupies a volume of 5 litres under certain conditions....

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  3. Henry thinks that a mole contains 6.023 xx 10^(24) molecules. Hence th...

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  4. One mole of oxygen (O(2)) is present in the following mass of sulphuri...

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  5. The number of gram - atoms of sulphur in 2 moles of peroxydisulphuric ...

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  6. Four ten litre flasks are separately filled with the gases hydrogen, h...

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  7. Which of the following has number of molecules present equal to those ...

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  8. If the relative atomic mass of oxygen is 64 units, the molecular mass ...

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  9. Both 22 grams of CO(2) and 8 grams of methane contain the following ca...

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  10. What is the mole percentage of O(2) in a mixture of 7g of N(2) and 8g ...

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  11. The number of oxygen molecules present in 100 grams of limestone is

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  12. 7.5 g of a gas occupies 5.6 litres as STP. The gas is

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  13. 3.011 xx 10^(22) atoms of an element weighs 1.15 g. The atomic mass of...

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  14. Equivalent weights 36. A bivalent metal has 12 equivalent weight. The ...

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  15. Molecular weight of Mohr's salt is 392. Its equivalent weight when it ...

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  16. The eqivalent weights of 'S' in SCI(2) and S(2)CI(2) are in the ratio

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  17. The equivalent weight of a metal in different compounds are 18.6 ad 28...

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  18. H(3)PO(4)+2KOHrarrK(2)HPO(4)+2H(2)O Based on the above reaction equi...

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  19. The following reaction occurs in acidic medium KMnP(4) + 8 H^(+) 5e^...

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  20. An alkane has C/H ratio (by mass) of 5.1428. Its molecular formula is

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