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प्रश्न
Which of the following weighs the least?
विकल्प
2 g atom of N
3 x 1025 atoms of carbon
1 mole of sulphur
7 g silver
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उत्तर
7 g silver
Explanation:
wt. of 2 g atom of N = 2 x 14 = 28 g
wt. of 3 x 1025 atoms of carbon = `(12 xx 3 xx 10^25)/(6.022 xx 10^23)` = 597.7 g
wt. of 1 mole of sulphur= 32 g
silver = 7 g
∴ silver has the least weight.
संबंधित प्रश्न
If one mole of carbon atoms weighs 12 gram, what is the mass (in gram) of 1 atom of carbon?
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[Avogadro’s number = 6 × 1023, O = 16 ]
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What volume of dinitrogen oxide is produced at the same time as 8.96 L of steam?
Define the term:
Mole
Calculate the number of particles in 0.1 mole of any substance.
Correct the statement, if required.
One mole of chlorine contains 6.023 x 1010 atoms of chlorine.
Correct the statement, if required.
Under the same conditions of temperature and pressure, equal volumes of all gases contain the same number of atoms.
Fill in the missing data in the Table
| Species Property | H2O | CO2 | Na atom | MgCl2 |
| No. of moles | 2 | - | - | 0.5 |
| No. of particles | - | 3.011×1023 | - | - |
| Mass | 36g | - | 115 g | - |
Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions.
(Mass of an electron = 9.1×10–31 kg)
