Home
Class 12
CHEMISTRY
One atom of an element x weights 6.643xx...

One atom of an element x weights `6.643xx10^(-23)g`. Number of moles of atoms in its 20 kg is:

A

140

B

150

C

250

D

500

Text Solution

Verified by Experts

The correct Answer is:
D
No. of atoms `= (20 xx 10^(3))/(6.6 xx 10^(-23)) = 3 xx 10^(26)` No. of moles `= (3 xx 10^(26))/(6 xx 10^(23)) = 500`
Promotional Banner

Topper's Solved these Questions

  • STOICHIOMETRY - I

    VMC MODULES ENGLISH|Exercise Level - 2|65 Videos

  • STOICHIOMETRY - I

    VMC MODULES ENGLISH|Exercise JEE Main (Archive)|33 Videos

  • STOICHIOMETRY - I

    VMC MODULES ENGLISH|Exercise Level -0 (Long Answer Type)|7 Videos

  • STATES OF MATTER

    VMC MODULES ENGLISH|Exercise IN-CHAPTER EXERCISE-I|10 Videos

  • STOICHIOMETRY-II

    VMC MODULES ENGLISH|Exercise JEE Advanced (Archive)|43 Videos

Similar Questions

Explore conceptually related problems

One atom of an element x weighs 6.643 xx 10^(-23)g . Number of moles of atoms in its 20kg is :

One atom of an element x weight 6.643xx10^(-23)g . Number of moles of atom in 20 kg is :

One atom of an element x weight 6.643xx10^(-232)g . Number of moles of atom in 20 kg is :

One atom of an element X weighs 6 xx 10^(-23) gm . Number of moles of atoms in 3.6 kg of sample of X will be : (N_(A) = 6 xx 10^(23))

One atom of an element weight 3.32xx10^(-23) g. How many number of gram atoms are in 20 kg of the element?

One atom of an element weighs 1*8xx10^(-22) g its atomic mass is

Mass of one atom of an element is 6.64× 10^(−23) g. This is equal to :

Weight of one atom an element is 6.44 xx 10^(23) g . Calculate g atom of elements in 40 kg .

Mass of one atom of an element is 5.64× 10^(−23) g. This is equal to :

Mass of one atom of an element is 4.64× 10^(−23) g. This is equal to :

VMC MODULES ENGLISH-STOICHIOMETRY - I-Level - 1
  1. 19.7 kg of gold was recovered from a smuggler. How many atoms of gold ...

    Text Solution

    |

  2. How many molecule are present in 12 L of liquid C Cl(4)? The density o...

    Text Solution

    |

  3. One atom of an element x weights 6.643xx10^(-23)g. Number of moles of ...

    Text Solution

    |

  4. The number of water molecules in one litre of water is:

    Text Solution

    |

  5. How many atoms are present in one mole of H(2)SO(4) ?

    Text Solution

    |

  6. The mass of one atom of hydrogen is approximately :

    Text Solution

    |

  7. Which of the following contains greatest number of oxygen atoms ? .

    Text Solution

    |

  8. The maximum number of molecules are present in

    Text Solution

    |

  9. One mole of CO(2) contains:

    Text Solution

    |

  10. What volumes of 10 M HCl and 3 M HCl should be mixed to get 1L of 6 M ...

    Text Solution

    |

  11. The molarity of 20% by mass H(2)SO(4) solution of density 1.02 g cm^(-...

    Text Solution

    |

  12. An element , X has the following isotopic composition : ^(200)X : 90%...

    Text Solution

    |

  13. A hydrate of Na(2)SO(3) has 50% water by mass. It is

    Text Solution

    |

  14. The sodium salt of an acid dye contains 7% of sodium. What is the mini...

    Text Solution

    |

  15. A metal nitride M(3)N(2) contains 28 % of nitrogen. The atomic mass of...

    Text Solution

    |

  16. 0.1 g of metal combines with 46.6 mL of oxygen at STP. The equivalent ...

    Text Solution

    |

  17. The equivalent mass of divalent metal is W. The molecular mass of its ...

    Text Solution

    |

  18. Calculate the density ("in gm L"^(-1)) of a 3.60 M sulphuric acid solu...

    Text Solution

    |

  19. The sulphate of a metal M contains 9.87% of M. This sulphate is isomor...

    Text Solution

    |

  20. The mass of 1 mol of electrons is

    Text Solution

    |